72825745 has 4 divisors (see below), whose sum is σ = 87390900. Its totient is φ = 58260592.

The previous prime is 72825721. The next prime is 72825769. The reversal of 72825745 is 54752827.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54752827 = 1487 ⋅36821.

It is an interprime number because it is at equal distance from previous prime (72825721) and next prime (72825769).

It can be written as a sum of positive squares in 2 ways, for example, as 46621584 + 26204161 = 6828^2 + 5119^2 .

It is a cyclic number.

It is not a de Polignac number, because 72825745 - 2¹¹ = 72823697 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 72825698 and 72825707.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7282570 + ... + 7282579.

It is an arithmetic number, because the mean of its divisors is an integer number (21847725).

Almost surely, 2^72825745 is an apocalyptic number.

It is an amenable number.

72825745 is a deficient number, since it is larger than the sum of its proper divisors (14565155).

72825745 is a wasteful number, since it uses less digits than its factorization.

72825745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14565154.

The product of its digits is 156800, while the sum is 40.

The square root of 72825745 is about 8533.8001499918. The cubic root of 72825745 is about 417.6011109644.

The spelling of 72825745 in words is "seventy-two million, eight hundred twenty-five thousand, seven hundred forty-five".