2145472 has 28 divisors (see below), whose sum is σ = 4866640. Its totient is φ = 919296.

The previous prime is 2145469. The next prime is 2145487. The reversal of 2145472 is 2745412.

It is a tau number, because it is divible by the number of its divisors (28).

It is an alternating number because its digits alternate between even and odd.

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, 1947 + ... + 2842.

2^2145472 is an apocalyptic number.

It is an amenable number.

2145472 is an abundant number, since it is smaller than the sum of its proper divisors (2721168).

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

2145472 is an equidigital number, since it uses as much as digits as its factorization.

2145472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4808 (or 4798 counting only the distinct ones).

The product of its digits is 2240, while the sum is 25.

The square root of 2145472 is about 1464.7429808673. The cubic root of 2145472 is about 128.9756178504.

The spelling of 2145472 in words is "two million, one hundred forty-five thousand, four hundred seventy-two".