72530253 has 6 divisors (see below), whose sum is σ = 104765934. Its totient is φ = 48353496.

The previous prime is 72530243. The next prime is 72530257. The reversal of 72530253 is 35203527.

It can be written as a sum of positive squares in only one way, i.e., 53187849 + 19342404 = 7293^2 + 4398^2 .

It is not a de Polignac number, because 72530253 - 2⁸ = 72529997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72530257) 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 5 ways as a sum of consecutive naturals, for example, 4029450 + ... + 4029467.

It is an arithmetic number, because the mean of its divisors is an integer number (17460989).

Almost surely, 2^72530253 is an apocalyptic number.

It is an amenable number.

72530253 is a deficient number, since it is larger than the sum of its proper divisors (32235681).

72530253 is a wasteful number, since it uses less digits than its factorization.

72530253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8058923 (or 8058920 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 72530253 is about 8516.4695150044. The cubic root of 72530253 is about 417.0355368848.

It can be divided in two parts, 7 and 2530253, that multiplied together give a palindrome (17711771).

The spelling of 72530253 in words is "seventy-two million, five hundred thirty thousand, two hundred fifty-three".