1252540291 has 2 divisors, whose sum is σ = 1252540292. Its totient is φ = 1252540290.

The previous prime is 1252540273. The next prime is 1252540309. The reversal of 1252540291 is 1920452521.

It is a balanced prime because it is at equal distance from previous prime (1252540273) and next prime (1252540309).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1252540291 is a prime.

It is a super-3 number, since 3×1252540291³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1252540231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626270145 + 626270146.

It is an arithmetic number, because the mean of its divisors is an integer number (626270146).

Almost surely, 2^1252540291 is an apocalyptic number.

1252540291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252540291 is an equidigital number, since it uses as much as digits as its factorization.

1252540291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1252540291 is about 35391.2459656339. The cubic root of 1252540291 is about 1077.9465700609.

The spelling of 1252540291 in words is "one billion, two hundred fifty-two million, five hundred forty thousand, two hundred ninety-one".