420515139 has 8 divisors (see below), whose sum is σ = 611658432. Its totient is φ = 254857640.

The previous prime is 420515119. The next prime is 420515143. The reversal of 420515139 is 931515024.

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 420515139 - 2⁵ = 420515107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420515119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6371409 + ... + 6371474.

It is an arithmetic number, because the mean of its divisors is an integer number (76457304).

Almost surely, 2^420515139 is an apocalyptic number.

420515139 is a deficient number, since it is larger than the sum of its proper divisors (191143293).

420515139 is a wasteful number, since it uses less digits than its factorization.

420515139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12742897.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 420515139 is about 20506.4657852103. The cubic root of 420515139 is about 749.1932890455.

The spelling of 420515139 in words is "four hundred twenty million, five hundred fifteen thousand, one hundred thirty-nine".