2151304 has 8 divisors (see below), whose sum is σ = 4033710. Its totient is φ = 1075648.

The previous prime is 2151301. The next prime is 2151319. The reversal of 2151304 is 4031512.

It can be written as a sum of positive squares in only one way, i.e., 1664100 + 487204 = 1290^2 + 698^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2151301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134449 + ... + 134464.

2^2151304 is an apocalyptic number.

It is an amenable number.

2151304 is a deficient number, since it is larger than the sum of its proper divisors (1882406).

2151304 is a wasteful number, since it uses less digits than its factorization.

2151304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268919 (or 268915 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2151304 is about 1466.7324227684. The cubic root of 2151304 is about 129.0923761954.

Adding to 2151304 its reverse (4031512), we get a palindrome (6182816).

The spelling of 2151304 in words is "two million, one hundred fifty-one thousand, three hundred four".