1151631 has 32 divisors (see below), whose sum is σ = 1955520. Its totient is φ = 663552.

The previous prime is 1151629. The next prime is 1151639. The reversal of 1151631 is 1361511.

It is not a de Polignac number, because 1151631 - 2¹ = 1151629 is a prime.

It is a super-2 number, since 2×1151631² = 2652507920322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1151639) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5871 + ... + 6063.

It is an arithmetic number, because the mean of its divisors is an integer number (61110).

2^1151631 is an apocalyptic number.

1151631 is a deficient number, since it is larger than the sum of its proper divisors (803889).

1151631 is a wasteful number, since it uses less digits than its factorization.

1151631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 226 counting only the distinct ones).

The product of its digits is 90, while the sum is 18.

The square root of 1151631 is about 1073.1407177067. The cubic root of 1151631 is about 104.8184618234.

The spelling of 1151631 in words is "one million, one hundred fifty-one thousand, six hundred thirty-one".