72102532 has 6 divisors (see below), whose sum is σ = 126179438. Its totient is φ = 36051264.

The previous prime is 72102523. The next prime is 72102557. The reversal of 72102532 is 23520127.

It can be written as a sum of positive squares in only one way, i.e., 68657796 + 3444736 = 8286^2 + 1856^2 .

It is a super-2 number, since 2×72102532² = 10397550241622048, which contains 22 as substring.

It is a plaindrome in base 11.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9012813 + ... + 9012820.

Almost surely, 2^72102532 is an apocalyptic number.

It is an amenable number.

72102532 is a deficient number, since it is larger than the sum of its proper divisors (54076906).

72102532 is a wasteful number, since it uses less digits than its factorization.

72102532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18025637 (or 18025635 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 72102532 is about 8491.3209808604. The cubic root of 72102532 is about 416.2141479400.

Adding to 72102532 its reverse (23520127), we get a palindrome (95622659).

The spelling of 72102532 in words is "seventy-two million, one hundred two thousand, five hundred thirty-two".