7447225 has 6 divisors (see below), whose sum is σ = 9234590. Its totient is φ = 5957760.

The previous prime is 7447217. The next prime is 7447243. The reversal of 7447225 is 5227447.

It can be written as a sum of positive squares in 3 ways, for example, as 1375929 + 6071296 = 1173^2 + 2464^2 .

It is not a de Polignac number, because 7447225 - 2³ = 7447217 is a prime.

It is a super-2 number, since 2×7447225² = 110922320401250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 148920 + ... + 148969.

Almost surely, 2^7447225 is an apocalyptic number.

It is an amenable number.

7447225 is a deficient number, since it is larger than the sum of its proper divisors (1787365).

7447225 is a wasteful number, since it uses less digits than its factorization.

7447225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297899 (or 297894 counting only the distinct ones).

The product of its digits is 15680, while the sum is 31.

The square root of 7447225 is about 2728.9604247772. The cubic root of 7447225 is about 195.2831739436.

The spelling of 7447225 in words is "seven million, four hundred forty-seven thousand, two hundred twenty-five".