72136741 has 4 divisors (see below), whose sum is σ = 72454752. Its totient is φ = 71818732.

The previous prime is 72136733. The next prime is 72136747. The reversal of 72136741 is 14763127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 72136741 - 2³ = 72136733 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 (72136747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158665 + ... + 159118.

It is an arithmetic number, because the mean of its divisors is an integer number (18113688).

Almost surely, 2^72136741 is an apocalyptic number.

It is an amenable number.

72136741 is a deficient number, since it is larger than the sum of its proper divisors (318011).

72136741 is a wasteful number, since it uses less digits than its factorization.

72136741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318010.

The product of its digits is 7056, while the sum is 31.

The square root of 72136741 is about 8493.3350928831. The cubic root of 72136741 is about 416.2799617111.

Adding to 72136741 its reverse (14763127), we get a palindrome (86899868).

The spelling of 72136741 in words is "seventy-two million, one hundred thirty-six thousand, seven hundred forty-one".