421941578 has 32 divisors (see below), whose sum is σ = 679432320. Its totient is φ = 196035840.

The previous prime is 421941563. The next prime is 421941587. The reversal of 421941578 is 875149124.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

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, 771101 + ... + 771647.

It is an arithmetic number, because the mean of its divisors is an integer number (21232260).

Almost surely, 2^421941578 is an apocalyptic number.

421941578 is a deficient number, since it is larger than the sum of its proper divisors (257490742).

421941578 is a wasteful number, since it uses less digits than its factorization.

421941578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022.

The product of its digits is 80640, while the sum is 41.

The square root of 421941578 is about 20541.2165657246. The cubic root of 421941578 is about 750.0394515544.

The spelling of 421941578 in words is "four hundred twenty-one million, nine hundred forty-one thousand, five hundred seventy-eight".