1297931 has 4 divisors (see below), whose sum is σ = 1302000. Its totient is φ = 1293864.

The previous prime is 1297927. The next prime is 1297963. The reversal of 1297931 is 1397921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1297931 - 2² = 1297927 is a prime.

It is a super-3 number, since 3×1297931³ = 6559580568333016473, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1297631) 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 3 ways as a sum of consecutive naturals, for example, 1511 + ... + 2208.

It is an arithmetic number, because the mean of its divisors is an integer number (325500).

2^1297931 is an apocalyptic number.

1297931 is a deficient number, since it is larger than the sum of its proper divisors (4069).

1297931 is an equidigital number, since it uses as much as digits as its factorization.

1297931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4068.

The product of its digits is 3402, while the sum is 32.

The square root of 1297931 is about 1139.2677472833. The cubic root of 1297931 is about 109.0813577707.

The spelling of 1297931 in words is "one million, two hundred ninety-seven thousand, nine hundred thirty-one".