72205274 has 4 divisors (see below), whose sum is σ = 108307914. Its totient is φ = 36102636.

The previous prime is 72205271. The next prime is 72205277. The reversal of 72205274 is 47250227.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (72205271) and next prime (72205277).

It can be written as a sum of positive squares in only one way, i.e., 60949249 + 11256025 = 7807^2 + 3355^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72205271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18051317 + ... + 18051320.

Almost surely, 2^72205274 is an apocalyptic number.

72205274 is a deficient number, since it is larger than the sum of its proper divisors (36102640).

72205274 is a wasteful number, since it uses less digits than its factorization.

72205274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36102639.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 72205274 is about 8497.3686515297. The cubic root of 72205274 is about 416.4117479290.

The spelling of 72205274 in words is "seventy-two million, two hundred five thousand, two hundred seventy-four".