2145224 has 8 divisors (see below), whose sum is σ = 4022310. Its totient is φ = 1072608.

The previous prime is 2145197. The next prime is 2145239. The reversal of 2145224 is 4225412.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1876900 + 268324 = 1370^2 + 518^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2145196 and 2145205.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134069 + ... + 134084.

2^2145224 is an apocalyptic number.

It is an amenable number.

2145224 is a deficient number, since it is larger than the sum of its proper divisors (1877086).

2145224 is a wasteful number, since it uses less digits than its factorization.

2145224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268159 (or 268155 counting only the distinct ones).

The product of its digits is 640, while the sum is 20.

The square root of 2145224 is about 1464.6583219304. The cubic root of 2145224 is about 128.9706481304.

The spelling of 2145224 in words is "two million, one hundred forty-five thousand, two hundred twenty-four".