421400553 has 16 divisors (see below), whose sum is σ = 642773376. Its totient is φ = 240560640.

The previous prime is 421400527. The next prime is 421400557. The reversal of 421400553 is 355004124.

It is not a de Polignac number, because 421400553 - 2⁵ = 421400521 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421400557) 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, 12825 + ... + 31737.

It is an arithmetic number, because the mean of its divisors is an integer number (40173336).

Almost surely, 2^421400553 is an apocalyptic number.

It is an amenable number.

421400553 is a deficient number, since it is larger than the sum of its proper divisors (221372823).

421400553 is a wasteful number, since it uses less digits than its factorization.

421400553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19984.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 421400553 is about 20528.0430874450. The cubic root of 421400553 is about 749.7187407597.

Adding to 421400553 its reverse (355004124), we get a palindrome (776404677).

The spelling of 421400553 in words is "four hundred twenty-one million, four hundred thousand, five hundred fifty-three".