72081272 has 16 divisors (see below), whose sum is σ = 137703240. Its totient is φ = 35360416.

The previous prime is 72081271. The next prime is 72081281. The reversal of 72081272 is 27218027.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72081271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84578 + ... + 85425.

Almost surely, 2^72081272 is an apocalyptic number.

It is an amenable number.

72081272 is a deficient number, since it is larger than the sum of its proper divisors (65621968).

72081272 is a wasteful number, since it uses less digits than its factorization.

72081272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170062 (or 170058 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 72081272 is about 8490.0690220987. The cubic root of 72081272 is about 416.1732359111.

Adding to 72081272 its reverse (27218027), we get a palindrome (99299299).

The spelling of 72081272 in words is "seventy-two million, eighty-one thousand, two hundred seventy-two".