1257081 has 16 divisors (see below), whose sum is σ = 1978368. Its totient is φ = 694800.

The previous prime is 1257079. The next prime is 1257089. The reversal of 1257081 is 1807521.

It is not a de Polignac number, because 1257081 - 2¹ = 1257079 is a prime.

It is a super-2 number, since 2×1257081² = 3160505281122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1257089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (123648).

2^1257081 is an apocalyptic number.

It is an amenable number.

1257081 is a deficient number, since it is larger than the sum of its proper divisors (721287).

1257081 is a wasteful number, since it uses less digits than its factorization.

1257081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1972.

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 1257081 is about 1121.1962361692. The cubic root of 1257081 is about 107.9247589790.

Subtracting from 1257081 its product of nonzero digits (560), we obtain a palindrome (1256521).

The spelling of 1257081 in words is "one million, two hundred fifty-seven thousand, eighty-one".