1400631 has 16 divisors (see below), whose sum is σ = 1990656. Its totient is φ = 874016.

The previous prime is 1400627. The next prime is 1400653. The reversal of 1400631 is 1360041.

It is a cyclic number.

It is not a de Polignac number, because 1400631 - 2² = 1400627 is a prime.

It is a super-2 number, since 2×1400631² = 3923534396322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1400631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1400131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3466 + ... + 3848.

It is an arithmetic number, because the mean of its divisors is an integer number (124416).

2^1400631 is an apocalyptic number.

1400631 is the 749-th centered pentagonal number.

1400631 is a deficient number, since it is larger than the sum of its proper divisors (590025).

1400631 is a wasteful number, since it uses less digits than its factorization.

1400631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1400631 is about 1183.4825727487. The cubic root of 1400631 is about 111.8856986533.

Adding to 1400631 its reverse (1360041), we get a palindrome (2760672).

The spelling of 1400631 in words is "one million, four hundred thousand, six hundred thirty-one".