421057507 has 8 divisors (see below), whose sum is σ = 453673584. Its totient is φ = 388473888.

The previous prime is 421057471. The next prime is 421057523. The reversal of 421057507 is 705750124.

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

It is a cyclic number.

It is not a de Polignac number, because 421057507 - 2⁷ = 421057379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421058507) 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, 23388 + ... + 37270.

It is an arithmetic number, because the mean of its divisors is an integer number (56709198).

Almost surely, 2^421057507 is an apocalyptic number.

421057507 is a deficient number, since it is larger than the sum of its proper divisors (32616077).

421057507 is a wasteful number, since it uses less digits than its factorization.

421057507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16229.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 421057507 is about 20519.6858406750. The cubic root of 421057507 is about 749.5152464565.

The spelling of 421057507 in words is "four hundred twenty-one million, fifty-seven thousand, five hundred seven".