72510261 has 8 divisors (see below), whose sum is σ = 96845760. Its totient is φ = 48257472.

The previous prime is 72510257. The next prime is 72510359. The reversal of 72510261 is 16201527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72510261 - 2² = 72510257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72514261) 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 7 ways as a sum of consecutive naturals, for example, 18601 + ... + 22158.

It is an arithmetic number, because the mean of its divisors is an integer number (12105720).

Almost surely, 2^72510261 is an apocalyptic number.

It is an amenable number.

72510261 is a deficient number, since it is larger than the sum of its proper divisors (24335499).

72510261 is a wasteful number, since it uses less digits than its factorization.

72510261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41355.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 72510261 is about 8515.2957083122. The cubic root of 72510261 is about 416.9972165966.

Adding to 72510261 its reverse (16201527), we get a palindrome (88711788).

It can be divided in two parts, 72510 and 261, that added together give a triangular number (72771 = T₃₈₁).

The spelling of 72510261 in words is "seventy-two million, five hundred ten thousand, two hundred sixty-one".