1296531 has 12 divisors (see below), whose sum is σ = 1900080. Its totient is φ = 851760.

The previous prime is 1296523. The next prime is 1296551. The reversal of 1296531 is 1356921.

1296531 is a `hidden beast` number, since 1 + 2 + 9 + 653 + 1 = 666.

It is not a de Polignac number, because 1296531 - 2³ = 1296523 is a prime.

It is a super-2 number, since 2×1296531² = 3361985267922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1296495 and 1296504.

It is not an unprimeable number, because it can be changed into a prime (1296511) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 376 + ... + 1653.

It is an arithmetic number, because the mean of its divisors is an integer number (158340).

2^1296531 is an apocalyptic number.

1296531 is a deficient number, since it is larger than the sum of its proper divisors (603549).

1296531 is a wasteful number, since it uses less digits than its factorization.

1296531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106 (or 2103 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1296531 is about 1138.6531517543. The cubic root of 1296531 is about 109.0421238305.

It can be divided in two parts, 12965 and 31, that added together give a square (12996 = 114²).

The spelling of 1296531 in words is "one million, two hundred ninety-six thousand, five hundred thirty-one".