1253001366 has 64 divisors (see below), whose sum is σ = 2864816640. Its totient is φ = 405781920.

The previous prime is 1253001329. The next prime is 1253001367. The reversal of 1253001366 is 6631003521.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253001367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271111 + ... + 275693.

It is an arithmetic number, because the mean of its divisors is an integer number (44762760).

Almost surely, 2^1253001366 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1253001366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1432408320).

1253001366 is an abundant number, since it is smaller than the sum of its proper divisors (1611815274).

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

1253001366 is a wasteful number, since it uses less digits than its factorization.

1253001366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4738 (or 4732 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 1253001366 is about 35397.7593358676. The cubic root of 1253001366 is about 1078.0788221583.

Adding to 1253001366 its reverse (6631003521), we get a palindrome (7884004887).

The spelling of 1253001366 in words is "one billion, two hundred fifty-three million, one thousand, three hundred sixty-six".