420801139 has 16 divisors (see below), whose sum is σ = 471144960. Its totient is φ = 372526560.

The previous prime is 420801133. The next prime is 420801179. The reversal of 420801139 is 931108024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420801139 - 2¹¹ = 420799091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420801133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182854 + ... + 185140.

It is an arithmetic number, because the mean of its divisors is an integer number (29446560).

Almost surely, 2^420801139 is an apocalyptic number.

420801139 is a deficient number, since it is larger than the sum of its proper divisors (50343821).

420801139 is a wasteful number, since it uses less digits than its factorization.

420801139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 420801139 is about 20513.4380102410. The cubic root of 420801139 is about 749.3630972188.

The spelling of 420801139 in words is "four hundred twenty million, eight hundred one thousand, one hundred thirty-nine".