72134501 has 2 divisors, whose sum is σ = 72134502. Its totient is φ = 72134500.

The previous prime is 72134477. The next prime is 72134563. The reversal of 72134501 is 10543127.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46226401 + 25908100 = 6799^2 + 5090^2 .

It is a cyclic number.

It is not a de Polignac number, because 72134501 - 2⁶ = 72134437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72134581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36067250 + 36067251.

It is an arithmetic number, because the mean of its divisors is an integer number (36067251).

Almost surely, 2^72134501 is an apocalyptic number.

It is an amenable number.

72134501 is a deficient number, since it is larger than the sum of its proper divisors (1).

72134501 is an equidigital number, since it uses as much as digits as its factorization.

72134501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 72134501 is about 8493.2032237549. The cubic root of 72134501 is about 416.2756528723.

Adding to 72134501 its reverse (10543127), we get a palindrome (82677628).

The spelling of 72134501 in words is "seventy-two million, one hundred thirty-four thousand, five hundred one".