72603725 has 12 divisors (see below), whose sum is σ = 91506420. Its totient is φ = 57129600.

The previous prime is 72603721. The next prime is 72603761. The reversal of 72603725 is 52730627.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 12432676 + 60171049 = 3526^2 + 7757^2 .

It is not a de Polignac number, because 72603725 - 2² = 72603721 is a prime.

It is a super-4 number, since 4×72603725⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72603691 and 72603700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72603721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22280 + ... + 25329.

It is an arithmetic number, because the mean of its divisors is an integer number (7625535).

Almost surely, 2^72603725 is an apocalyptic number.

It is an amenable number.

72603725 is a deficient number, since it is larger than the sum of its proper divisors (18902695).

72603725 is a wasteful number, since it uses less digits than its factorization.

72603725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47680 (or 47675 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 32.

The square root of 72603725 is about 8520.7819476853. The cubic root of 72603725 is about 417.1763061658.

The spelling of 72603725 in words is "seventy-two million, six hundred three thousand, seven hundred twenty-five".