1113631 has 4 divisors (see below), whose sum is σ = 1122264. Its totient is φ = 1105000.

The previous prime is 1113617. The next prime is 1113643. The reversal of 1113631 is 1363111.

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 1113631 - 2⁵ = 1113599 is a prime.

It is a super-2 number, since 2×1113631² = 2480348008322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1116631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4120 + ... + 4381.

It is an arithmetic number, because the mean of its divisors is an integer number (280566).

2^1113631 is an apocalyptic number.

1113631 is a deficient number, since it is larger than the sum of its proper divisors (8633).

1113631 is an equidigital number, since it uses as much as digits as its factorization.

1113631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8632.

The product of its digits is 54, while the sum is 16.

The square root of 1113631 is about 1055.2871647092. The cubic root of 1113631 is about 103.6526565550.

Adding to 1113631 its reverse (1363111), we get a palindrome (2476742).

It can be divided in two parts, 11 and 13631, that multiplied together give a palindrome (149941).

The spelling of 1113631 in words is "one million, one hundred thirteen thousand, six hundred thirty-one".