1253344540 has 72 divisors (see below), whose sum is σ = 3105037152. Its totient is φ = 423642240.

The previous prime is 1253344531. The next prime is 1253344597. The reversal of 1253344540 is 454433521.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 60574 + ... + 78586.

It is an arithmetic number, because the mean of its divisors is an integer number (43125516).

Almost surely, 2^1253344540 is an apocalyptic number.

1253344540 is a gapful number since it is divisible by the number (10) 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 1253344540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1552518576).

1253344540 is an abundant number, since it is smaller than the sum of its proper divisors (1851692612).

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

1253344540 is a wasteful number, since it uses less digits than its factorization.

1253344540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18107 (or 18098 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 31.

The square root of 1253344540 is about 35402.6064012242. The cubic root of 1253344540 is about 1078.1772351531.

The spelling of 1253344540 in words is "one billion, two hundred fifty-three million, three hundred forty-four thousand, five hundred forty".