2145756 has 12 divisors (see below), whose sum is σ = 5006792. Its totient is φ = 715248.

The previous prime is 2145721. The next prime is 2145763. The reversal of 2145756 is 6575412.

It is a tau number, because it is divible by the number of its divisors (12).

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, 89395 + ... + 89418.

2^2145756 is an apocalyptic number.

It is an amenable number.

2145756 is an abundant number, since it is smaller than the sum of its proper divisors (2861036).

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

2145756 is a wasteful number, since it uses less digits than its factorization.

2145756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178820 (or 178818 counting only the distinct ones).

The product of its digits is 8400, while the sum is 30.

The square root of 2145756 is about 1464.8399229950. The cubic root of 2145756 is about 128.9813085111.

The spelling of 2145756 in words is "two million, one hundred forty-five thousand, seven hundred fifty-six".