2151774 has 24 divisors (see below), whose sum is σ = 4695912. Its totient is φ = 712080.

The previous prime is 2151767. The next prime is 2151781. The reversal of 2151774 is 4771512.

2151774 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2151767) and next prime (2151781).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2769 + ... + 3459.

It is an arithmetic number, because the mean of its divisors is an integer number (195663).

2^2151774 is an apocalyptic number.

2151774 is an abundant number, since it is smaller than the sum of its proper divisors (2544138).

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

2151774 is a wasteful number, since it uses less digits than its factorization.

2151774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872 (or 869 counting only the distinct ones).

The product of its digits is 1960, while the sum is 27.

The square root of 2151774 is about 1466.8926341079. The cubic root of 2151774 is about 129.1017765403.

The spelling of 2151774 in words is "two million, one hundred fifty-one thousand, seven hundred seventy-four".