74218225 has 9 divisors (see below), whose sum is σ = 92084043. Its totient is φ = 59340120.

The previous prime is 74218219. The next prime is 74218253. The reversal of 74218225 is 52281247.

It is a happy number.

The square root of 74218225 is 8615.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 26718561 + 47499664 = 5169^2 + 6892^2 .

It is a de Polignac number, because none of the positive numbers 2^k-74218225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 42214 + ... + 43936.

Almost surely, 2^74218225 is an apocalyptic number.

74218225 is the 8615-th square number.

74218225 is the 4308-th centered octagonal number.

It is an amenable number.

74218225 is a deficient number, since it is larger than the sum of its proper divisors (17865818).

74218225 is an frugal number, since it uses more digits than its factorization.

74218225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3456 (or 1728 counting only the distinct ones).

The product of its digits is 8960, while the sum is 31.

The cubic root of 74218225 is about 420.2459349495.

The spelling of 74218225 in words is "seventy-four million, two hundred eighteen thousand, two hundred twenty-five".