72755261 has 2 divisors, whose sum is σ = 72755262. Its totient is φ = 72755260.

The previous prime is 72755251. The next prime is 72755281. The reversal of 72755261 is 16255727.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72352036 + 403225 = 8506^2 + 635^2 .

It is a cyclic number.

It is not a de Polignac number, because 72755261 - 2²² = 68560957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72755251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36377630 + 36377631.

It is an arithmetic number, because the mean of its divisors is an integer number (36377631).

Almost surely, 2^72755261 is an apocalyptic number.

It is an amenable number.

72755261 is a deficient number, since it is larger than the sum of its proper divisors (1).

72755261 is an equidigital number, since it uses as much as digits as its factorization.

72755261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 35.

The square root of 72755261 is about 8529.6694543224. The cubic root of 72755261 is about 417.4663431580.

The spelling of 72755261 in words is "seventy-two million, seven hundred fifty-five thousand, two hundred sixty-one".