1257955 has 16 divisors (see below), whose sum is σ = 1586304. Its totient is φ = 956800.

The previous prime is 1257953. The next prime is 1257959. The reversal of 1257955 is 5597521.

It is not a de Polignac number, because 1257955 - 2¹ = 1257953 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1257955.

It is not an unprimeable number, because it can be changed into a prime (1257953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12405 + ... + 12505.

It is an arithmetic number, because the mean of its divisors is an integer number (99144).

2^1257955 is an apocalyptic number.

1257955 is a deficient number, since it is larger than the sum of its proper divisors (328349).

1257955 is a wasteful number, since it uses less digits than its factorization.

1257955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its digits is 15750, while the sum is 34.

The square root of 1257955 is about 1121.5859307249. The cubic root of 1257955 is about 107.9497651606.

The spelling of 1257955 in words is "one million, two hundred fifty-seven thousand, nine hundred fifty-five".