72007501 has 4 divisors (see below), whose sum is σ = 72234972. Its totient is φ = 71780032.

The previous prime is 72007487. The next prime is 72007517. The reversal of 72007501 is 10570027.

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 8820900 + 63186601 = 2970^2 + 7949^2 .

It is a cyclic number.

It is not a de Polignac number, because 72007501 - 2⁷ = 72007373 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 (72007531) 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, 113260 + ... + 113893.

It is an arithmetic number, because the mean of its divisors is an integer number (18058743).

Almost surely, 2^72007501 is an apocalyptic number.

It is an amenable number.

72007501 is a deficient number, since it is larger than the sum of its proper divisors (227471).

72007501 is a wasteful number, since it uses less digits than its factorization.

72007501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227470.

The product of its (nonzero) digits is 490, while the sum is 22.

The square root of 72007501 is about 8485.7233633910. The cubic root of 72007501 is about 416.0312110613.

Adding to 72007501 its reverse (10570027), we get a palindrome (82577528).

The spelling of 72007501 in words is "seventy-two million, seven thousand, five hundred one".