421874641 has 4 divisors (see below), whose sum is σ = 426957552. Its totient is φ = 416791732.

The previous prime is 421874633. The next prime is 421874681. The reversal of 421874641 is 146478124.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 421874641 - 2³ = 421874633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 421874641.

It is not an unprimeable number, because it can be changed into a prime (421874681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2541331 + ... + 2541496.

It is an arithmetic number, because the mean of its divisors is an integer number (106739388).

Almost surely, 2^421874641 is an apocalyptic number.

It is an amenable number.

421874641 is a deficient number, since it is larger than the sum of its proper divisors (5082911).

421874641 is an equidigital number, since it uses as much as digits as its factorization.

421874641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082910.

The product of its digits is 43008, while the sum is 37.

The square root of 421874641 is about 20539.5871672242. The cubic root of 421874641 is about 749.9997872592. Note that the first 3 decimals are identical.

The spelling of 421874641 in words is "four hundred twenty-one million, eight hundred seventy-four thousand, six hundred forty-one".