72547149 has 16 divisors (see below), whose sum is σ = 104192000. Its totient is φ = 44752176.

The previous prime is 72547147. The next prime is 72547151. The reversal of 72547149 is 94174527.

It is an interprime number because it is at equal distance from previous prime (72547147) and next prime (72547151).

It is not a de Polignac number, because 72547149 - 2¹ = 72547147 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 (72547147) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12349 + ... + 17250.

It is an arithmetic number, because the mean of its divisors is an integer number (6512000).

Almost surely, 2^72547149 is an apocalyptic number.

It is an amenable number.

72547149 is a deficient number, since it is larger than the sum of its proper divisors (31644851).

72547149 is a wasteful number, since it uses less digits than its factorization.

72547149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29664.

The product of its digits is 70560, while the sum is 39.

The square root of 72547149 is about 8517.4614175821. The cubic root of 72547149 is about 417.0679173287.

It can be divided in two parts, 725 and 47149, that added together give a palindrome (47874).

The spelling of 72547149 in words is "seventy-two million, five hundred forty-seven thousand, one hundred forty-nine".