72570361 has 2 divisors, whose sum is σ = 72570362. Its totient is φ = 72570360.

The previous prime is 72570343. The next prime is 72570389. The reversal of 72570361 is 16307527.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71723961 + 846400 = 8469^2 + 920^2 .

It is an emirp because it is prime and its reverse (16307527) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72570361 - 2⁷ = 72570233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72570341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36285180 + 36285181.

It is an arithmetic number, because the mean of its divisors is an integer number (36285181).

Almost surely, 2^72570361 is an apocalyptic number.

It is an amenable number.

72570361 is a deficient number, since it is larger than the sum of its proper divisors (1).

72570361 is an equidigital number, since it uses as much as digits as its factorization.

72570361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 72570361 is about 8518.8239211760. The cubic root of 72570361 is about 417.1123939131.

Adding to 72570361 its reverse (16307527), we get a palindrome (88877888).

The spelling of 72570361 in words is "seventy-two million, five hundred seventy thousand, three hundred sixty-one".