7791225 has 48 divisors (see below), whose sum is σ = 14207424. Its totient is φ = 3744000.

The previous prime is 7791139. The next prime is 7791233. The reversal of 7791225 is 5221977.

It is not a de Polignac number, because 7791225 - 2⁷ = 7791097 is a prime.

7791225 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59410 + ... + 59540.

It is an arithmetic number, because the mean of its divisors is an integer number (295988).

Almost surely, 2^7791225 is an apocalyptic number.

7791225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7791225 is a deficient number, since it is larger than the sum of its proper divisors (6416199).

7791225 is a wasteful number, since it uses less digits than its factorization.

7791225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 213 counting only the distinct ones).

The product of its digits is 8820, while the sum is 33.

The square root of 7791225 is about 2791.2765896629. The cubic root of 7791225 is about 198.2448506439.

The spelling of 7791225 in words is "seven million, seven hundred ninety-one thousand, two hundred twenty-five".