1090631 has 4 divisors (see below), whose sum is σ = 1106064. Its totient is φ = 1075200.

The previous prime is 1090627. The next prime is 1090681. The reversal of 1090631 is 1360901.

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 1090631 - 2² = 1090627 is a prime.

It is a super-2 number, since 2×1090631² = 2378951956322, 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 (1090681) 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, 7610 + ... + 7751.

It is an arithmetic number, because the mean of its divisors is an integer number (276516).

2^1090631 is an apocalyptic number.

1090631 is a deficient number, since it is larger than the sum of its proper divisors (15433).

1090631 is an equidigital number, since it uses as much as digits as its factorization.

1090631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15432.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 1090631 is about 1044.3328013617. The cubic root of 1090631 is about 102.9341018139.

The spelling of 1090631 in words is "one million, ninety thousand, six hundred thirty-one".