1315531 has 8 divisors (see below), whose sum is σ = 1569024. Its totient is φ = 1078440.

The previous prime is 1315519. The next prime is 1315537. The reversal of 1315531 is 1355131.

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 1315531 - 2⁹ = 1315019 is a prime.

It is a super-2 number, since 2×1315531² = 3461243623922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1315499 and 1315508.

It is not an unprimeable number, because it can be changed into a prime (1315537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3925 + ... + 4246.

It is an arithmetic number, because the mean of its divisors is an integer number (196128).

2^1315531 is an apocalyptic number.

1315531 is a deficient number, since it is larger than the sum of its proper divisors (253493).

1315531 is an equidigital number, since it uses as much as digits as its factorization.

1315531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8201.

The product of its digits is 225, while the sum is 19.

The square root of 1315531 is about 1146.9659977523. The cubic root of 1315531 is about 109.5721951151.

The spelling of 1315531 in words is "one million, three hundred fifteen thousand, five hundred thirty-one".