1515131 has 4 divisors (see below), whose sum is σ = 1518552. Its totient is φ = 1511712.

The previous prime is 1515119. The next prime is 1515149. The reversal of 1515131 is 1315151.

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 1515131 - 2¹⁸ = 1252987 is a prime.

It is a super-2 number, since 2×1515131² = 4591243894322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1514131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926 + ... + 1971.

It is an arithmetic number, because the mean of its divisors is an integer number (379638).

2^1515131 is an apocalyptic number.

1515131 is a deficient number, since it is larger than the sum of its proper divisors (3421).

1515131 is an equidigital number, since it uses as much as digits as its factorization.

1515131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420.

The product of its digits is 75, while the sum is 17.

The square root of 1515131 is about 1230.9065764712. The cubic root of 1515131 is about 114.8550410467.

The spelling of 1515131 in words is "one million, five hundred fifteen thousand, one hundred thirty-one".