1404630621 has 6 divisors (see below), whose sum is σ = 2028910910. Its totient is φ = 936420408.

The previous prime is 1404630547. The next prime is 1404630629. The reversal of 1404630621 is 1260364041.

1404630621 is a `hidden beast` number, since 1 + 4 + 0 + 4 + 6 + 30 + 621 = 666.

It can be written as a sum of positive squares in only one way, i.e., 801682596 + 602948025 = 28314^2 + 24555^2 .

It is not a de Polignac number, because 1404630621 - 2¹⁵ = 1404597853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1404630629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 78035026 + ... + 78035043.

Almost surely, 2^1404630621 is an apocalyptic number.

It is an amenable number.

1404630621 is a deficient number, since it is larger than the sum of its proper divisors (624280289).

1404630621 is a wasteful number, since it uses less digits than its factorization.

1404630621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156070075 (or 156070072 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1404630621 is about 37478.4020603867. The cubic root of 1404630621 is about 1119.9209715178.

Adding to 1404630621 its reverse (1260364041), we get a palindrome (2664994662).

It can be divided in two parts, 1404 and 630621, that added together give a square (632025 = 795²).

The spelling of 1404630621 in words is "one billion, four hundred four million, six hundred thirty thousand, six hundred twenty-one".