2128515 has 16 divisors (see below), whose sum is σ = 3489696. Its totient is φ = 1107200.

The previous prime is 2128501. The next prime is 2128531. The reversal of 2128515 is 5158212.

It is not a de Polignac number, because 2128515 - 2⁷ = 2128387 is a prime.

It is a super-2 number, since 2×2128515² = 9061152210450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1116 + ... + 2345.

It is an arithmetic number, because the mean of its divisors is an integer number (218106).

2^2128515 is an apocalyptic number.

2128515 is a deficient number, since it is larger than the sum of its proper divisors (1361181).

2128515 is a wasteful number, since it uses less digits than its factorization.

2128515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3510.

The product of its digits is 800, while the sum is 24.

The square root of 2128515 is about 1458.9431106112. The cubic root of 2128515 is about 128.6349271881.

The spelling of 2128515 in words is "two million, one hundred twenty-eight thousand, five hundred fifteen".