72102501 has 8 divisors (see below), whose sum is σ = 106818560. Its totient is φ = 48068316.

The previous prime is 72102479. The next prime is 72102509. The reversal of 72102501 is 10520127.

It is not a de Polignac number, because 72102501 - 2¹⁸ = 71840357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72102509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1335205 + ... + 1335258.

It is an arithmetic number, because the mean of its divisors is an integer number (13352320).

Almost surely, 2^72102501 is an apocalyptic number.

It is an amenable number.

72102501 is a deficient number, since it is larger than the sum of its proper divisors (34716059).

72102501 is a wasteful number, since it uses less digits than its factorization.

72102501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2670472 (or 2670466 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 72102501 is about 8491.3191554670. The cubic root of 72102501 is about 416.2140882905.

Adding to 72102501 its reverse (10520127), we get a palindrome (82622628).

The spelling of 72102501 in words is "seventy-two million, one hundred two thousand, five hundred one".