421452531 has 8 divisors (see below), whose sum is σ = 624374160. Its totient is φ = 280968336.

The previous prime is 421452523. The next prime is 421452553. The reversal of 421452531 is 135254124.

It is not a de Polignac number, because 421452531 - 2³ = 421452523 is a prime.

It is a super-2 number, since 2×421452531² = 355244471772611922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15609353 = 421452531 / (4 + 2 + 1 + 4 + 5 + 2 + 5 + 3 + 1).

It is a junction number, because it is equal to n+sod(n) for n = 421452495 and 421452504.

It is not an unprimeable number, because it can be changed into a prime (421450531) 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, 7804650 + ... + 7804703.

It is an arithmetic number, because the mean of its divisors is an integer number (78046770).

Almost surely, 2^421452531 is an apocalyptic number.

421452531 is a deficient number, since it is larger than the sum of its proper divisors (202921629).

421452531 is a wasteful number, since it uses less digits than its factorization.

421452531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15609362 (or 15609356 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 421452531 is about 20529.3090726405. The cubic root of 421452531 is about 749.7495643853.

The spelling of 421452531 in words is "four hundred twenty-one million, four hundred fifty-two thousand, five hundred thirty-one".