420624261 has 12 divisors (see below), whose sum is σ = 639545920. Its totient is φ = 265657320.

The previous prime is 420624229. The next prime is 420624263. The reversal of 420624261 is 162426024.

It is not a de Polignac number, because 420624261 - 2⁵ = 420624229 is a prime.

It is a super-2 number, since 2×420624261² = 353849537883592242, 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 (420624263) 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 11 ways as a sum of consecutive naturals, for example, 1229725 + ... + 1230066.

Almost surely, 2^420624261 is an apocalyptic number.

It is an amenable number.

420624261 is a deficient number, since it is larger than the sum of its proper divisors (218921659).

420624261 is a wasteful number, since it uses less digits than its factorization.

420624261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459816 (or 2459813 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 420624261 is about 20509.1262856320. The cubic root of 420624261 is about 749.2580876634.

The spelling of 420624261 in words is "four hundred twenty million, six hundred twenty-four thousand, two hundred sixty-one".