2155974 has 32 divisors (see below), whose sum is σ = 4769280. Its totient is φ = 646272.

The previous prime is 2155963. The next prime is 2155999. The reversal of 2155974 is 4795512.

2155974 = 227² + 228² + ... + 262².

It is a congruent number.

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, 1887 + ... + 2805.

It is an arithmetic number, because the mean of its divisors is an integer number (149040).

2^2155974 is an apocalyptic number.

2155974 is an abundant number, since it is smaller than the sum of its proper divisors (2613306).

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

2155974 is a wasteful number, since it uses less digits than its factorization.

2155974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964.

The product of its digits is 12600, while the sum is 33.

The square root of 2155974 is about 1468.3235338303. The cubic root of 2155974 is about 129.1857189147.

The spelling of 2155974 in words is "two million, one hundred fifty-five thousand, nine hundred seventy-four".