7899225 has 12 divisors (see below), whose sum is σ = 13060176. Its totient is φ = 4212880.

The previous prime is 7899217. The next prime is 7899239. The reversal of 7899225 is 5229987.

It is not a de Polignac number, because 7899225 - 2³ = 7899217 is a prime.

7899225 is a lucky number.

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, 52587 + ... + 52736.

It is an arithmetic number, because the mean of its divisors is an integer number (1088348).

Almost surely, 2^7899225 is an apocalyptic number.

7899225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

7899225 is a deficient number, since it is larger than the sum of its proper divisors (5160951).

7899225 is a wasteful number, since it uses less digits than its factorization.

7899225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105336 (or 105331 counting only the distinct ones).

The product of its digits is 90720, while the sum is 42.

The square root of 7899225 is about 2810.5559948167. Note that the first 3 decimals coincide. The cubic root of 7899225 is about 199.1566571963.

The spelling of 7899225 in words is "seven million, eight hundred ninety-nine thousand, two hundred twenty-five".