421563457 has 8 divisors (see below), whose sum is σ = 482253632. Its totient is φ = 360990000.

The previous prime is 421563449. The next prime is 421563479. The reversal of 421563457 is 754365124.

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

It is not a de Polignac number, because 421563457 - 2³ = 421563449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421563407) 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, 21294 + ... + 36007.

It is an arithmetic number, because the mean of its divisors is an integer number (60281704).

Almost surely, 2^421563457 is an apocalyptic number.

It is an amenable number.

421563457 is a deficient number, since it is larger than the sum of its proper divisors (60690175).

421563457 is a wasteful number, since it uses less digits than its factorization.

421563457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58359.

The product of its digits is 100800, while the sum is 37.

The square root of 421563457 is about 20532.0105445132. The cubic root of 421563457 is about 749.8153364622.

The spelling of 421563457 in words is "four hundred twenty-one million, five hundred sixty-three thousand, four hundred fifty-seven".