77298225 has 12 divisors (see below), whose sum is σ = 127799856. Its totient is φ = 41225680.

The previous prime is 77298223. The next prime is 77298241. The reversal of 77298225 is 52289277.

It is a happy number.

It is not a de Polignac number, because 77298225 - 2¹ = 77298223 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (77298223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 515247 + ... + 515396.

It is an arithmetic number, because the mean of its divisors is an integer number (10649988).

Almost surely, 2^77298225 is an apocalyptic number.

77298225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77298225 is a deficient number, since it is larger than the sum of its proper divisors (50501631).

77298225 is a wasteful number, since it uses less digits than its factorization.

77298225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030656 (or 1030651 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 77298225 is about 8791.9409119943. The cubic root of 77298225 is about 425.9806191452.

The spelling of 77298225 in words is "seventy-seven million, two hundred ninety-eight thousand, two hundred twenty-five".