2155970 has 16 divisors (see below), whose sum is σ = 3907008. Its totient is φ = 856560.

The previous prime is 2155963. The next prime is 2155999. The reversal of 2155970 is 795512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1025 + ... + 2315.

It is an arithmetic number, because the mean of its divisors is an integer number (244188).

2^2155970 is an apocalyptic number.

2155970 is a deficient number, since it is larger than the sum of its proper divisors (1751038).

2155970 is a wasteful number, since it uses less digits than its factorization.

2155970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1465.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 2155970 is about 1468.3221717321. The cubic root of 2155970 is about 129.1856390215.

It can be divided in two parts, 2155 and 970, that added together give a 5-th power (3125 = 5⁵).

The spelling of 2155970 in words is "two million, one hundred fifty-five thousand, nine hundred seventy".