421634523 has 8 divisors (see below), whose sum is σ = 562457088. Its totient is φ = 280950824.

The previous prime is 421634513. The next prime is 421634533. The reversal of 421634523 is 325436124.

It is an interprime number because it is at equal distance from previous prime (421634513) and next prime (421634533).

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

It is a cyclic number.

It is not a de Polignac number, because 421634523 - 2¹⁸ = 421372379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421634513) 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, 27411 + ... + 39932.

It is an arithmetic number, because the mean of its divisors is an integer number (70307136).

Almost surely, 2^421634523 is an apocalyptic number.

421634523 is a deficient number, since it is larger than the sum of its proper divisors (140822565).

421634523 is a wasteful number, since it uses less digits than its factorization.

421634523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69433.

The product of its digits is 17280, while the sum is 30.

The square root of 421634523 is about 20533.7410863194. The cubic root of 421634523 is about 749.8574680257.

The spelling of 421634523 in words is "four hundred twenty-one million, six hundred thirty-four thousand, five hundred twenty-three".