1252520557 has 2 divisors, whose sum is σ = 1252520558. Its totient is φ = 1252520556.

The previous prime is 1252520513. The next prime is 1252520561. The reversal of 1252520557 is 7550252521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1232992996 + 19527561 = 35114^2 + 4419^2 .

It is a cyclic number.

It is not a de Polignac number, because 1252520557 - 2²³ = 1244131949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1252520587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 626260278 + 626260279.

It is an arithmetic number, because the mean of its divisors is an integer number (626260279).

Almost surely, 2^1252520557 is an apocalyptic number.

It is an amenable number.

1252520557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1252520557 is an equidigital number, since it uses as much as digits as its factorization.

1252520557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35000, while the sum is 34.

The square root of 1252520557 is about 35390.9671667786. The cubic root of 1252520557 is about 1077.9409089497.

The spelling of 1252520557 in words is "one billion, two hundred fifty-two million, five hundred twenty thousand, five hundred fifty-seven".