2120915 has 8 divisors (see below), whose sum is σ = 2633040. Its totient is φ = 1638112.

The previous prime is 2120891. The next prime is 2120917. The reversal of 2120915 is 5190212.

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 2120915 - 2⁶ = 2120851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2120917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7169 + ... + 7458.

It is an arithmetic number, because the mean of its divisors is an integer number (329130).

2^2120915 is an apocalyptic number.

2120915 is a deficient number, since it is larger than the sum of its proper divisors (512125).

2120915 is a wasteful number, since it uses less digits than its factorization.

2120915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14661.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2120915 is about 1456.3361562496. The cubic root of 2120915 is about 128.4816448420.

The spelling of 2120915 in words is "two million, one hundred twenty thousand, nine hundred fifteen".