2152904 has 32 divisors (see below), whose sum is σ = 4408320. Its totient is φ = 979776.

The previous prime is 2152903. The next prime is 2152907. The reversal of 2152904 is 4092512.

2152904 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2152904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2152903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13127 + ... + 13289.

It is an arithmetic number, because the mean of its divisors is an integer number (137760).

2^2152904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2152904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2204160).

2152904 is an abundant number, since it is smaller than the sum of its proper divisors (2255416).

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

2152904 is a wasteful number, since it uses less digits than its factorization.

2152904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2152904 is about 1467.2777514840. The cubic root of 2152904 is about 129.1243717691.

It can be divided in two parts, 21 and 52904, that added together give a palindrome (52925).

The spelling of 2152904 in words is "two million, one hundred fifty-two thousand, nine hundred four".