2015402120 has 16 divisors (see below), whose sum is σ = 4534654860. Its totient is φ = 806160832.

The previous prime is 2015402113. The next prime is 2015402141. The reversal of 2015402120 is 212045102.

It can be written as a sum of positive squares in 2 ways, for example, as 1885122724 + 130279396 = 43418^2 + 11414^2 .

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, 25192487 + ... + 25192566.

Almost surely, 2^2015402120 is an apocalyptic number.

2015402120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2015402120 is an abundant number, since it is smaller than the sum of its proper divisors (2519252740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2015402120 is a wasteful number, since it uses less digits than its factorization.

2015402120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50385064 (or 50385060 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 2015402120 is about 44893.2302246118. The cubic root of 2015402120 is about 1263.1470254023.

Adding to 2015402120 its reverse (212045102), we get a palindrome (2227447222).

The spelling of 2015402120 in words is "two billion, fifteen million, four hundred two thousand, one hundred twenty".