1331957 has 8 divisors (see below), whose sum is σ = 1529760. Its totient is φ = 1146960.

The previous prime is 1331951. The next prime is 1331959. The reversal of 1331957 is 7591331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1331957 - 2¹⁰ = 1330933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331951) 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 7 ways as a sum of consecutive naturals, for example, 2978 + ... + 3395.

It is an arithmetic number, because the mean of its divisors is an integer number (191220).

2^1331957 is an apocalyptic number.

It is an amenable number.

1331957 is a deficient number, since it is larger than the sum of its proper divisors (197803).

1331957 is a wasteful number, since it uses less digits than its factorization.

1331957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6403.

The product of its digits is 2835, while the sum is 29.

The square root of 1331957 is about 1154.1044146870. The cubic root of 1331957 is about 110.0263573203.

It can be divided in two parts, 133 and 1957, that multiplied together give a triangular number (260281 = T₇₂₁).

The spelling of 1331957 in words is "one million, three hundred thirty-one thousand, nine hundred fifty-seven".