1225172 has 12 divisors (see below), whose sum is σ = 2309076. Its totient is φ = 565440.

The previous prime is 1225157. The next prime is 1225183. The reversal of 1225172 is 2715221.

It can be written as a sum of positive squares in 2 ways, for example, as 217156 + 1008016 = 466^2 + 1004^2 .

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, 11729 + ... + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (192423).

2^1225172 is an apocalyptic number.

It is an amenable number.

1225172 is a deficient number, since it is larger than the sum of its proper divisors (1083904).

1225172 is a wasteful number, since it uses less digits than its factorization.

1225172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23578 (or 23576 counting only the distinct ones).

The product of its digits is 280, while the sum is 20.

The square root of 1225172 is about 1106.8748800113. The cubic root of 1225172 is about 107.0037556547.

The spelling of 1225172 in words is "one million, two hundred twenty-five thousand, one hundred seventy-two".