1612631 has 4 divisors (see below), whose sum is σ = 1643112. Its totient is φ = 1582152.

The previous prime is 1612621. The next prime is 1612649. The reversal of 1612631 is 1362161.

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 1612631 - 2¹⁰ = 1611607 is a prime.

It is a super-2 number, since 2×1612631² = 5201157484322, 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 (1612601) 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, 15161 + ... + 15266.

It is an arithmetic number, because the mean of its divisors is an integer number (410778).

2^1612631 is an apocalyptic number.

1612631 is a deficient number, since it is larger than the sum of its proper divisors (30481).

1612631 is an equidigital number, since it uses as much as digits as its factorization.

1612631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30480.

The product of its digits is 216, while the sum is 20.

The square root of 1612631 is about 1269.8940900721. The cubic root of 1612631 is about 117.2676803928.

Adding to 1612631 its reverse (1362161), we get a palindrome (2974792).

The spelling of 1612631 in words is "one million, six hundred twelve thousand, six hundred thirty-one".