72862261 has 2 divisors, whose sum is σ = 72862262. Its totient is φ = 72862260.

The previous prime is 72862247. The next prime is 72862277. The reversal of 72862261 is 16226827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40883236 + 31979025 = 6394^2 + 5655^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72862261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72862291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36431130 + 36431131.

It is an arithmetic number, because the mean of its divisors is an integer number (36431131).

Almost surely, 2^72862261 is an apocalyptic number.

It is an amenable number.

72862261 is a deficient number, since it is larger than the sum of its proper divisors (1).

72862261 is an equidigital number, since it uses as much as digits as its factorization.

72862261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 72862261 is about 8535.9393741990. The cubic root of 72862261 is about 417.6708966067.

The spelling of 72862261 in words is "seventy-two million, eight hundred sixty-two thousand, two hundred sixty-one".