421560403 has 16 divisors (see below), whose sum is σ = 468179712. Its totient is φ = 376380000.

The previous prime is 421560383. The next prime is 421560409. The reversal of 421560403 is 304065124.

It is a cyclic number.

It is not a de Polignac number, because 421560403 - 2²⁵ = 388005971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421560409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 163978 + ... + 166528.

It is an arithmetic number, because the mean of its divisors is an integer number (29261232).

Almost surely, 2^421560403 is an apocalyptic number.

421560403 is a deficient number, since it is larger than the sum of its proper divisors (46619309).

421560403 is a wasteful number, since it uses less digits than its factorization.

421560403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2826.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 421560403 is about 20531.9361727042. The cubic root of 421560403 is about 749.8135257885.

The spelling of 421560403 in words is "four hundred twenty-one million, five hundred sixty thousand, four hundred three".