1257492037 has 2 divisors, whose sum is σ = 1257492038. Its totient is φ = 1257492036.

The previous prime is 1257492013. The next prime is 1257492107. The reversal of 1257492037 is 7302947521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1183428801 + 74063236 = 34401^2 + 8606^2 .

It is a cyclic number.

It is not a de Polignac number, because 1257492037 - 2¹⁹ = 1256967749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1257492337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628746018 + 628746019.

It is an arithmetic number, because the mean of its divisors is an integer number (628746019).

Almost surely, 2^1257492037 is an apocalyptic number.

It is an amenable number.

1257492037 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257492037 is an equidigital number, since it uses as much as digits as its factorization.

1257492037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 1257492037 is about 35461.1341753193. The cubic root of 1257492037 is about 1079.3652068066.

The spelling of 1257492037 in words is "one billion, two hundred fifty-seven million, four hundred ninety-two thousand, thirty-seven".