7172225 has 12 divisors (see below), whose sum is σ = 9063036. Its totient is φ = 5628480.

The previous prime is 7172219. The next prime is 7172237. The reversal of 7172225 is 5222717.

It can be written as a sum of positive squares in 6 ways, for example, as 223729 + 6948496 = 473^2 + 2636^2 .

It is not a de Polignac number, because 7172225 - 2¹⁰ = 7171201 is a prime.

It is a super-2 number, since 2×7172225² = 102881622901250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7172194 and 7172203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1382 + ... + 4031.

It is an arithmetic number, because the mean of its divisors is an integer number (755253).

Almost surely, 2^7172225 is an apocalyptic number.

It is an amenable number.

7172225 is a deficient number, since it is larger than the sum of its proper divisors (1890811).

7172225 is a wasteful number, since it uses less digits than its factorization.

7172225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5471 counting only the distinct ones).

The product of its digits is 1960, while the sum is 26.

The square root of 7172225 is about 2678.1010063103. The cubic root of 7172225 is about 192.8492563239.

The spelling of 7172225 in words is "seven million, one hundred seventy-two thousand, two hundred twenty-five".