2115129 has 4 divisors (see below), whose sum is σ = 2820176. Its totient is φ = 1410084.

The previous prime is 2115121. The next prime is 2115131. The reversal of 2115129 is 9215112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2115129 - 2³ = 2115121 is a prime.

It is a D-number.

It is a Duffinian number.

2115129 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2115121) 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, 352519 + ... + 352524.

It is an arithmetic number, because the mean of its divisors is an integer number (705044).

2^2115129 is an apocalyptic number.

It is an amenable number.

2115129 is a deficient number, since it is larger than the sum of its proper divisors (705047).

2115129 is an equidigital number, since it uses as much as digits as its factorization.

2115129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 705046.

The product of its digits is 180, while the sum is 21.

The square root of 2115129 is about 1454.3483076622. The cubic root of 2115129 is about 128.3647028879.

The spelling of 2115129 in words is "two million, one hundred fifteen thousand, one hundred twenty-nine".