420612531 has 8 divisors (see below), whose sum is σ = 561215424. Its totient is φ = 280209000.

The previous prime is 420612529. The next prime is 420612539. The reversal of 420612531 is 135216024.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420612531 - 2¹ = 420612529 is a prime.

It is a super-2 number, since 2×420612531² = 353829802468451922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420612539) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44845 + ... + 53406.

It is an arithmetic number, because the mean of its divisors is an integer number (70151928).

Almost surely, 2^420612531 is an apocalyptic number.

420612531 is a deficient number, since it is larger than the sum of its proper divisors (140602893).

420612531 is a wasteful number, since it uses less digits than its factorization.

420612531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99681.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 420612531 is about 20508.8403133868. The cubic root of 420612531 is about 749.2511227149.

Adding to 420612531 its reverse (135216024), we get a palindrome (555828555).

The spelling of 420612531 in words is "four hundred twenty million, six hundred twelve thousand, five hundred thirty-one".