1252901257 has 2 divisors, whose sum is σ = 1252901258. Its totient is φ = 1252901256.

The previous prime is 1252901213. The next prime is 1252901261. The reversal of 1252901257 is 7521092521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664402176 + 588499081 = 25776^2 + 24259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252901257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1252901267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626450628 + 626450629.

It is an arithmetic number, because the mean of its divisors is an integer number (626450629).

Almost surely, 2^1252901257 is an apocalyptic number.

It is an amenable number.

1252901257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252901257 is an equidigital number, since it uses as much as digits as its factorization.

1252901257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 34.

The square root of 1252901257 is about 35396.3452491920. The cubic root of 1252901257 is about 1078.0501102270.

Adding to 1252901257 its reverse (7521092521), we get a palindrome (8773993778).

The spelling of 1252901257 in words is "one billion, two hundred fifty-two million, nine hundred one thousand, two hundred fifty-seven".