1521131 has 4 divisors (see below), whose sum is σ = 1524264. Its totient is φ = 1518000.

The previous prime is 1521119. The next prime is 1521133. The reversal of 1521131 is 1311251.

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 1521131 - 2⁶ = 1521067 is a prime.

It is a super-2 number, since 2×1521131² = 4627679038322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1521133) 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, 665 + ... + 1866.

It is an arithmetic number, because the mean of its divisors is an integer number (381066).

2^1521131 is an apocalyptic number.

1521131 is a deficient number, since it is larger than the sum of its proper divisors (3133).

1521131 is an equidigital number, since it uses as much as digits as its factorization.

1521131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132.

The product of its digits is 30, while the sum is 14.

The square root of 1521131 is about 1233.3413963700. The cubic root of 1521131 is about 115.0064520640.

Adding to 1521131 its reverse (1311251), we get a palindrome (2832382).

The spelling of 1521131 in words is "one million, five hundred twenty-one thousand, one hundred thirty-one".