72641501 has 4 divisors (see below), whose sum is σ = 72870972. Its totient is φ = 72412032.

The previous prime is 72641477. The next prime is 72641509. The reversal of 72641501 is 10514627.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8561476 + 64080025 = 2926^2 + 8005^2 .

It is a cyclic number.

It is not a de Polignac number, because 72641501 - 2¹⁸ = 72379357 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 (72641509) 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, 114260 + ... + 114893.

It is an arithmetic number, because the mean of its divisors is an integer number (18217743).

Almost surely, 2^72641501 is an apocalyptic number.

It is an amenable number.

72641501 is a deficient number, since it is larger than the sum of its proper divisors (229471).

72641501 is a wasteful number, since it uses less digits than its factorization.

72641501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229470.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 72641501 is about 8522.9983573857. The cubic root of 72641501 is about 417.2486464382.

The spelling of 72641501 in words is "seventy-two million, six hundred forty-one thousand, five hundred one".