420051239 has 4 divisors (see below), whose sum is σ = 421648656. Its totient is φ = 418453824.

The previous prime is 420051227. The next prime is 420051241. The reversal of 420051239 is 932150024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420051239 - 2²⁴ = 403274023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (429051239) 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, 798314 + ... + 798839.

It is an arithmetic number, because the mean of its divisors is an integer number (105412164).

Almost surely, 2^420051239 is an apocalyptic number.

420051239 is a deficient number, since it is larger than the sum of its proper divisors (1597417).

420051239 is a wasteful number, since it uses less digits than its factorization.

420051239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1597416.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 420051239 is about 20495.1515973901. The cubic root of 420051239 is about 748.9176916368.

The spelling of 420051239 in words is "four hundred twenty million, fifty-one thousand, two hundred thirty-nine".