421573375 has 16 divisors (see below), whose sum is σ = 540349056. Its totient is φ = 328140000.

The previous prime is 421573343. The next prime is 421573391. The reversal of 421573375 is 573375124.

It is not a de Polignac number, because 421573375 - 2⁵ = 421573343 is a prime.

It is a super-2 number, since 2×421573375² = 355448221017781250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40951 + ... + 50200.

It is an arithmetic number, because the mean of its divisors is an integer number (33771816).

Almost surely, 2^421573375 is an apocalyptic number.

421573375 is a deficient number, since it is larger than the sum of its proper divisors (118775681).

421573375 is an equidigital number, since it uses as much as digits as its factorization.

421573375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91203 (or 91193 counting only the distinct ones).

The product of its digits is 88200, while the sum is 37.

The square root of 421573375 is about 20532.2520683923. The cubic root of 421573375 is about 749.8212166447.

The spelling of 421573375 in words is "four hundred twenty-one million, five hundred seventy-three thousand, three hundred seventy-five".