78453225 has 48 divisors (see below), whose sum is σ = 146240640. Its totient is φ = 41227200.

The previous prime is 78453217. The next prime is 78453227. The reversal of 78453225 is 52235487.

It is not a de Polignac number, because 78453225 - 2³ = 78453217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78453225.

It is not an unprimeable number, because it can be changed into a prime (78453227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 47107 + ... + 48743.

It is an arithmetic number, because the mean of its divisors is an integer number (3046680).

Almost surely, 2^78453225 is an apocalyptic number.

78453225 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

78453225 is a deficient number, since it is larger than the sum of its proper divisors (67787415).

78453225 is a wasteful number, since it uses less digits than its factorization.

78453225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1716 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 78453225 is about 8857.3825140388. The cubic root of 78453225 is about 428.0918242003.

The spelling of 78453225 in words is "seventy-eight million, four hundred fifty-three thousand, two hundred twenty-five".