2151904 has 12 divisors (see below), whose sum is σ = 4236624. Its totient is φ = 1075936.

The previous prime is 2151899. The next prime is 2151917. The reversal of 2151904 is 4091512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33592 + ... + 33655.

It is an arithmetic number, because the mean of its divisors is an integer number (353052).

2^2151904 is an apocalyptic number.

It is an amenable number.

2151904 is a deficient number, since it is larger than the sum of its proper divisors (2084720).

2151904 is an equidigital number, since it uses as much as digits as its factorization.

2151904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67257 (or 67249 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2151904 is about 1466.9369447935. The cubic root of 2151904 is about 129.1043763940.

The spelling of 2151904 in words is "two million, one hundred fifty-one thousand, nine hundred four".