420266187 has 48 divisors (see below), whose sum is σ = 700128000. Its totient is φ = 240252480.

The previous prime is 420266179. The next prime is 420266191. The reversal of 420266187 is 781662024.

It is not a de Polignac number, because 420266187 - 2³ = 420266179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420266137) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 701314 + ... + 701912.

It is an arithmetic number, because the mean of its divisors is an integer number (14586000).

Almost surely, 2^420266187 is an apocalyptic number.

420266187 is a deficient number, since it is larger than the sum of its proper divisors (279861813).

420266187 is a wasteful number, since it uses less digits than its factorization.

420266187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1008 (or 1005 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 420266187 is about 20500.3948010764. The cubic root of 420266187 is about 749.0454148718.

The spelling of 420266187 in words is "four hundred twenty million, two hundred sixty-six thousand, one hundred eighty-seven".