1253461536 has 72 divisors (see below), whose sum is σ = 3581598384. Its totient is φ = 415820160.

The previous prime is 1253461513. The next prime is 1253461537. The reversal of 1253461536 is 6351643521.

1253461536 is a `hidden beast` number, since 1 + 2 + 5 + 3 + 4 + 615 + 36 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1253461536.

It is not an unprimeable number, because it can be changed into a prime (1253461537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50455 + ... + 71081.

It is an arithmetic number, because the mean of its divisors is an integer number (49744422).

Almost surely, 2^1253461536 is an apocalyptic number.

1253461536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253461536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1790799192).

1253461536 is an abundant number, since it is smaller than the sum of its proper divisors (2328136848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1253461536 is a wasteful number, since it uses less digits than its factorization.

1253461536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20854 (or 20843 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1253461536 is about 35404.2587268820. The cubic root of 1253461536 is about 1078.2107823263.

The spelling of 1253461536 in words is "one billion, two hundred fifty-three million, four hundred sixty-one thousand, five hundred thirty-six".