2145544 has 16 divisors (see below), whose sum is σ = 4041900. Its totient is φ = 1067712.

The previous prime is 2145529. The next prime is 2145547. The reversal of 2145544 is 4455412.

It is a happy number.

2145544 is nontrivially palindromic in base 7.

It can be written as a sum of positive squares in 2 ways, for example, as 2137444 + 8100 = 1462^2 + 90^2 .

It is not an unprimeable number, because it can be changed into a prime (2145547) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1654 + ... + 2650.

2^2145544 is an apocalyptic number.

It is an amenable number.

2145544 is a deficient number, since it is larger than the sum of its proper divisors (1896356).

2145544 is a wasteful number, since it uses less digits than its factorization.

2145544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1268 counting only the distinct ones).

The product of its digits is 3200, while the sum is 25.

The square root of 2145544 is about 1464.7675583518. The cubic root of 2145544 is about 128.9770606007.

The spelling of 2145544 in words is "two million, one hundred forty-five thousand, five hundred forty-four".