421302857 has 8 divisors (see below), whose sum is σ = 450418176. Its totient is φ = 392668992.

The previous prime is 421302841. The next prime is 421302859. The reversal of 421302857 is 758203124.

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

It is not a de Polignac number, because 421302857 - 2⁴ = 421302841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421302859) 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, 118553 + ... + 122054.

It is an arithmetic number, because the mean of its divisors is an integer number (56302272).

Almost surely, 2^421302857 is an apocalyptic number.

It is an amenable number.

421302857 is a deficient number, since it is larger than the sum of its proper divisors (29115319).

421302857 is a wasteful number, since it uses less digits than its factorization.

421302857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240727.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 421302857 is about 20525.6633753942. The cubic root of 421302857 is about 749.6607989096.

The spelling of 421302857 in words is "four hundred twenty-one million, three hundred two thousand, eight hundred fifty-seven".