1257131 has 2 divisors, whose sum is σ = 1257132. Its totient is φ = 1257130.

The previous prime is 1257119. The next prime is 1257163. The reversal of 1257131 is 1317521.

It is a weak prime.

It is an emirp because it is prime and its reverse (1317521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1257131 - 2¹⁰ = 1256107 is a prime.

It is a super-2 number, since 2×1257131² = 3160756702322, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1257331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628565 + 628566.

It is an arithmetic number, because the mean of its divisors is an integer number (628566).

2^1257131 is an apocalyptic number.

1257131 is a deficient number, since it is larger than the sum of its proper divisors (1).

1257131 is an equidigital number, since it uses as much as digits as its factorization.

1257131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 210, while the sum is 20.

The square root of 1257131 is about 1121.2185335607. The cubic root of 1257131 is about 107.9261898511.

The spelling of 1257131 in words is "one million, two hundred fifty-seven thousand, one hundred thirty-one".