72474525 has 18 divisors (see below), whose sum is σ = 129810330. Its totient is φ = 38652960.

The previous prime is 72474487. The next prime is 72474529. The reversal of 72474525 is 52547427.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 5447556 + 67026969 = 2334^2 + 8187^2 .

It is not a de Polignac number, because 72474525 - 2⁷ = 72474397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72474525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72474529) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 160830 + ... + 161279.

It is an arithmetic number, because the mean of its divisors is an integer number (7211685).

Almost surely, 2^72474525 is an apocalyptic number.

72474525 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

72474525 is a deficient number, since it is larger than the sum of its proper divisors (57335805).

72474525 is a wasteful number, since it uses less digits than its factorization.

72474525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322125 (or 322117 counting only the distinct ones).

The product of its digits is 78400, while the sum is 36.

The square root of 72474525 is about 8513.1971080200. The cubic root of 72474525 is about 416.9287009545.

The spelling of 72474525 in words is "seventy-two million, four hundred seventy-four thousand, five hundred twenty-five".