421974641 has 4 divisors (see below), whose sum is σ = 460335984. Its totient is φ = 383613300.

The previous prime is 421974617. The next prime is 421974673. The reversal of 421974641 is 146479124.

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 421974641 - 2⁶ = 421974577 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 421974595 and 421974604.

It is not an unprimeable number, because it can be changed into a prime (421974611) 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, 19180655 + ... + 19180676.

It is an arithmetic number, because the mean of its divisors is an integer number (115083996).

Almost surely, 2^421974641 is an apocalyptic number.

It is an amenable number.

421974641 is a deficient number, since it is larger than the sum of its proper divisors (38361343).

421974641 is a wasteful number, since it uses less digits than its factorization.

421974641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38361342.

The product of its digits is 48384, while the sum is 38.

The square root of 421974641 is about 20542.0213464985. The cubic root of 421974641 is about 750.0590418705.

The spelling of 421974641 in words is "four hundred twenty-one million, nine hundred seventy-four thousand, six hundred forty-one".