72570247 has 2 divisors, whose sum is σ = 72570248. Its totient is φ = 72570246.

The previous prime is 72570241. The next prime is 72570257. The reversal of 72570247 is 74207527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72570247 - 2⁷ = 72570119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72570241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36285123 + 36285124.

It is an arithmetic number, because the mean of its divisors is an integer number (36285124).

Almost surely, 2^72570247 is an apocalyptic number.

72570247 is a deficient number, since it is larger than the sum of its proper divisors (1).

72570247 is an equidigital number, since it uses as much as digits as its factorization.

72570247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27440, while the sum is 34.

The square root of 72570247 is about 8518.8172301089. The cubic root of 72570247 is about 417.1121755005.

The spelling of 72570247 in words is "seventy-two million, five hundred seventy thousand, two hundred forty-seven".