421424523 has 24 divisors (see below), whose sum is σ = 662931360. Its totient is φ = 256417920.

The previous prime is 421424483. The next prime is 421424587. The reversal of 421424523 is 325424124.

It is not a de Polignac number, because 421424523 - 2⁹ = 421424011 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421424923) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9823 + ... + 30648.

It is an arithmetic number, because the mean of its divisors is an integer number (27622140).

Almost surely, 2^421424523 is an apocalyptic number.

421424523 is a deficient number, since it is larger than the sum of its proper divisors (241506837).

421424523 is a wasteful number, since it uses less digits than its factorization.

421424523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40579 (or 40576 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 421424523 is about 20528.6269146283. The cubic root of 421424523 is about 749.7329555943.

Adding to 421424523 its reverse (325424124), we get a palindrome (746848647).

It can be divided in two parts, 42142 and 4523, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 421424523 in words is "four hundred twenty-one million, four hundred twenty-four thousand, five hundred twenty-three".