2145123604 has 12 divisors (see below), whose sum is σ = 4042733044. Its totient is φ = 990057024.

The previous prime is 2145123557. The next prime is 2145123611. The reversal of 2145123604 is 4063215412.

It can be written as a sum of positive squares in 2 ways, for example, as 252873604 + 1892250000 = 15902^2 + 43500^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20626137 + ... + 20626240.

Almost surely, 2^2145123604 is an apocalyptic number.

It is an amenable number.

2145123604 is a deficient number, since it is larger than the sum of its proper divisors (1897609440).

2145123604 is a wasteful number, since it uses less digits than its factorization.

2145123604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41252394 (or 41252392 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 2145123604 is about 46315.4790971658. The cubic root of 2145123604 is about 1289.6863616655.

The spelling of 2145123604 in words is "two billion, one hundred forty-five million, one hundred twenty-three thousand, six hundred four".