2157304 has 8 divisors (see below), whose sum is σ = 4044960. Its totient is φ = 1078648.

The previous prime is 2157301. The next prime is 2157307. The reversal of 2157304 is 4037512.

2157304 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 (2157301) and next prime (2157307).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157301) by changing a digit.

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 as a sum of consecutive naturals, namely, 134824 + ... + 134839.

It is an arithmetic number, because the mean of its divisors is an integer number (505620).

2^2157304 is an apocalyptic number.

It is an amenable number.

2157304 is a deficient number, since it is larger than the sum of its proper divisors (1887656).

2157304 is a wasteful number, since it uses less digits than its factorization.

2157304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269669 (or 269665 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2157304 is about 1468.7763614656. The cubic root of 2157304 is about 129.2122779374.

The spelling of 2157304 in words is "two million, one hundred fifty-seven thousand, three hundred four".