72015701 has 2 divisors, whose sum is σ = 72015702. Its totient is φ = 72015700.

The previous prime is 72015677. The next prime is 72015707. The reversal of 72015701 is 10751027.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71808676 + 207025 = 8474^2 + 455^2 .

It is a cyclic number.

It is not a de Polignac number, because 72015701 - 2⁶ = 72015637 is a prime.

It is a super-2 number, since 2×72015701² = 10372522381042802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72015707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36007850 + 36007851.

It is an arithmetic number, because the mean of its divisors is an integer number (36007851).

Almost surely, 2^72015701 is an apocalyptic number.

It is an amenable number.

72015701 is a deficient number, since it is larger than the sum of its proper divisors (1).

72015701 is an equidigital number, since it uses as much as digits as its factorization.

72015701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 72015701 is about 8486.2065141028. The cubic root of 72015701 is about 416.0470025941.

Adding to 72015701 its reverse (10751027), we get a palindrome (82766728).

The spelling of 72015701 in words is "seventy-two million, fifteen thousand, seven hundred one".