7272139 has 6 divisors (see below), whose sum is σ = 8459484. Its totient is φ = 6233220.

The previous prime is 7272137. The next prime is 7272143. The reversal of 7272139 is 9312727.

It is not a de Polignac number, because 7272139 - 2¹ = 7272137 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7272139.

It is not an unprimeable number, because it can be changed into a prime (7272131) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 74157 + ... + 74254.

It is an arithmetic number, because the mean of its divisors is an integer number (1409914).

Almost surely, 2^7272139 is an apocalyptic number.

7272139 is a deficient number, since it is larger than the sum of its proper divisors (1187345).

7272139 is a wasteful number, since it uses less digits than its factorization.

7272139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148425 (or 148418 counting only the distinct ones).

The product of its digits is 5292, while the sum is 31.

The square root of 7272139 is about 2696.6903789646. The cubic root of 7272139 is about 193.7406372167.

The spelling of 7272139 in words is "seven million, two hundred seventy-two thousand, one hundred thirty-nine".