7811225 has 12 divisors (see below), whose sum is σ = 9999360. Its totient is φ = 6046800.

The previous prime is 7811203. The next prime is 7811249. The reversal of 7811225 is 5221187.

It is not a de Polignac number, because 7811225 - 2¹⁴ = 7794841 is a prime.

It is a super-2 number, since 2×7811225² = 122030472001250, 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 a junction number, because it is equal to n+sod(n) for n = 7811194 and 7811203.

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, 4265 + ... + 5814.

It is an arithmetic number, because the mean of its divisors is an integer number (833280).

Almost surely, 2^7811225 is an apocalyptic number.

It is an amenable number.

7811225 is a deficient number, since it is larger than the sum of its proper divisors (2188135).

7811225 is a wasteful number, since it uses less digits than its factorization.

7811225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10120 (or 10115 counting only the distinct ones).

The product of its digits is 1120, while the sum is 26.

The square root of 7811225 is about 2794.8568836347. The cubic root of 7811225 is about 198.4143365816.

The spelling of 7811225 in words is "seven million, eight hundred eleven thousand, two hundred twenty-five".