421012257 has 4 divisors (see below), whose sum is σ = 561349680. Its totient is φ = 280674836.

The previous prime is 421012253. The next prime is 421012283. The reversal of 421012257 is 752210124.

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 421012257 - 2² = 421012253 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421012253) 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, 70168707 + ... + 70168712.

It is an arithmetic number, because the mean of its divisors is an integer number (140337420).

Almost surely, 2^421012257 is an apocalyptic number.

It is an amenable number.

421012257 is a deficient number, since it is larger than the sum of its proper divisors (140337423).

421012257 is a wasteful number, since it uses less digits than its factorization.

421012257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140337422.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 421012257 is about 20518.5832113233. The cubic root of 421012257 is about 749.4883959833.

The spelling of 421012257 in words is "four hundred twenty-one million, twelve thousand, two hundred fifty-seven".