1353631 has 4 divisors (see below), whose sum is σ = 1356264. Its totient is φ = 1351000.

The previous prime is 1353629. The next prime is 1353641. The reversal of 1353631 is 1363531.

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 1353631 - 2¹ = 1353629 is a prime.

It is a super-2 number, since 2×1353631² = 3664633768322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353641) 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, 265 + ... + 1666.

It is an arithmetic number, because the mean of its divisors is an integer number (339066).

2^1353631 is an apocalyptic number.

1353631 is a deficient number, since it is larger than the sum of its proper divisors (2633).

1353631 is an equidigital number, since it uses as much as digits as its factorization.

1353631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632.

The product of its digits is 810, while the sum is 22.

The square root of 1353631 is about 1163.4564882281. The cubic root of 1353631 is about 110.6199430589.

The spelling of 1353631 in words is "one million, three hundred fifty-three thousand, six hundred thirty-one".