70652521 has 2 divisors, whose sum is σ = 70652522. Its totient is φ = 70652520.

The previous prime is 70652509. The next prime is 70652563. The reversal of 70652521 is 12525607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47265625 + 23386896 = 6875^2 + 4836^2 .

It is a cyclic number.

It is not a de Polignac number, because 70652521 - 2⁵ = 70652489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70652521.

It is not a weakly prime, because it can be changed into another prime (70652501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35326260 + 35326261.

It is an arithmetic number, because the mean of its divisors is an integer number (35326261).

Almost surely, 2^70652521 is an apocalyptic number.

It is an amenable number.

70652521 is a deficient number, since it is larger than the sum of its proper divisors (1).

70652521 is an equidigital number, since it uses as much as digits as its factorization.

70652521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 70652521 is about 8405.5053982494. The cubic root of 70652521 is about 413.4051548076.

The spelling of 70652521 in words is "seventy million, six hundred fifty-two thousand, five hundred twenty-one".