1252651297 has 4 divisors (see below), whose sum is σ = 1258121620. Its totient is φ = 1247180976.

The previous prime is 1252651291. The next prime is 1252651313. The reversal of 1252651297 is 7921562521.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 510579216 + 742072081 = 22596^2 + 27241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252651297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1252651291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2734818 + ... + 2735275.

It is an arithmetic number, because the mean of its divisors is an integer number (314530405).

Almost surely, 2^1252651297 is an apocalyptic number.

It is an amenable number.

1252651297 is a deficient number, since it is larger than the sum of its proper divisors (5470323).

1252651297 is an equidigital number, since it uses as much as digits as its factorization.

1252651297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470322.

The product of its digits is 75600, while the sum is 40.

The square root of 1252651297 is about 35392.8142000604. The cubic root of 1252651297 is about 1077.9784133485.

The spelling of 1252651297 in words is "one billion, two hundred fifty-two million, six hundred fifty-one thousand, two hundred ninety-seven".