420862457 has 8 divisors (see below), whose sum is σ = 442290816. Its totient is φ = 399963312.

The previous prime is 420862451. The next prime is 420862459. The reversal of 420862457 is 754268024.

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 420862457 - 2¹⁴ = 420846073 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420862457.

It is not an unprimeable number, because it can be changed into a prime (420862451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130673 + ... + 133854.

It is an arithmetic number, because the mean of its divisors is an integer number (55286352).

Almost surely, 2^420862457 is an apocalyptic number.

It is an amenable number.

420862457 is a deficient number, since it is larger than the sum of its proper divisors (21428359).

420862457 is a wasteful number, since it uses less digits than its factorization.

420862457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264607.

The product of its (nonzero) digits is 107520, while the sum is 38.

The square root of 420862457 is about 20514.9325370570. The cubic root of 420862457 is about 749.3994938366.

The spelling of 420862457 in words is "four hundred twenty million, eight hundred sixty-two thousand, four hundred fifty-seven".