421057707 has 8 divisors (see below), whose sum is σ = 641611776. Its totient is φ = 240604392.

The previous prime is 421057687. The next prime is 421057723. The reversal of 421057707 is 707750124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 421057707 - 2⁷ = 421057579 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (421058707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10025163 + ... + 10025204.

It is an arithmetic number, because the mean of its divisors is an integer number (80201472).

Almost surely, 2^421057707 is an apocalyptic number.

421057707 is a deficient number, since it is larger than the sum of its proper divisors (220554069).

421057707 is a wasteful number, since it uses less digits than its factorization.

421057707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20050377.

The product of its (nonzero) digits is 13720, while the sum is 33.

The square root of 421057707 is about 20519.6907140434. The cubic root of 421057707 is about 749.5153651284.

The spelling of 421057707 in words is "four hundred twenty-one million, fifty-seven thousand, seven hundred seven".