2161974 has 16 divisors (see below), whose sum is σ = 4339440. Its totient is φ = 718080.

The previous prime is 2161967. The next prime is 2161987. The reversal of 2161974 is 4791612.

It is a happy number.

It is an Ulam number.

It is a congruent number.

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, 2014 + ... + 2894.

It is an arithmetic number, because the mean of its divisors is an integer number (271215).

2^2161974 is an apocalyptic number.

2161974 is an abundant number, since it is smaller than the sum of its proper divisors (2177466).

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

2161974 is a wasteful number, since it uses less digits than its factorization.

2161974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295.

The product of its digits is 3024, while the sum is 30.

The square root of 2161974 is about 1470.3652607431. The cubic root of 2161974 is about 129.3054476907.

The spelling of 2161974 in words is "two million, one hundred sixty-one thousand, nine hundred seventy-four".