420061631 has 16 divisors (see below), whose sum is σ = 466000128. Its totient is φ = 375446400.

The previous prime is 420061601. The next prime is 420061639. The reversal of 420061631 is 136160024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420061631 - 2²⁶ = 352952767 is a prime.

It is a super-2 number, since 2×420061631² = 352903547676760322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 420061597 and 420061606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420061639) 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, 462680 + ... + 463586.

It is an arithmetic number, because the mean of its divisors is an integer number (29125008).

Almost surely, 2^420061631 is an apocalyptic number.

420061631 is a deficient number, since it is larger than the sum of its proper divisors (45938497).

420061631 is a wasteful number, since it uses less digits than its factorization.

420061631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1582.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 420061631 is about 20495.4051191968. The cubic root of 420061631 is about 748.9238676203.

The spelling of 420061631 in words is "four hundred twenty million, sixty-one thousand, six hundred thirty-one".