420745256 has 16 divisors (see below), whose sum is σ = 823197600. Its totient is φ = 201225904.

The previous prime is 420745249. The next prime is 420745301. The reversal of 420745256 is 652547024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1143146 + ... + 1143513.

It is an arithmetic number, because the mean of its divisors is an integer number (51449850).

Almost surely, 2^420745256 is an apocalyptic number.

420745256 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is an amenable number.

420745256 is a deficient number, since it is larger than the sum of its proper divisors (402452344).

420745256 is a wasteful number, since it uses less digits than its factorization.

420745256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286688 (or 2286684 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 420745256 is about 20512.0758578941. The cubic root of 420745256 is about 749.3299235825.

The spelling of 420745256 in words is "four hundred twenty million, seven hundred forty-five thousand, two hundred fifty-six".