72081207 has 24 divisors (see below), whose sum is σ = 120266640. Its totient is φ = 41114880.

The previous prime is 72081203. The next prime is 72081253. The reversal of 72081207 is 70218027.

It is not a de Polignac number, because 72081207 - 2² = 72081203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72081203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19732 + ... + 23097.

It is an arithmetic number, because the mean of its divisors is an integer number (5011110).

Almost surely, 2^72081207 is an apocalyptic number.

72081207 is a deficient number, since it is larger than the sum of its proper divisors (48185433).

72081207 is a wasteful number, since it uses less digits than its factorization.

72081207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42863 (or 42860 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 72081207 is about 8490.0651940960. The cubic root of 72081207 is about 416.1731108149.

The spelling of 72081207 in words is "seventy-two million, eighty-one thousand, two hundred seven".