70502561 has 4 divisors (see below), whose sum is σ = 71832852. Its totient is φ = 69172272.

The previous prime is 70502533. The next prime is 70502563. The reversal of 70502561 is 16520507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55726225 + 14776336 = 7465^2 + 3844^2 .

It is a cyclic number.

It is not a de Polignac number, because 70502561 - 2¹⁰ = 70501537 is a prime.

It is a super-2 number, since 2×70502561² = 9941222215117442, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70502561.

It is not an unprimeable number, because it can be changed into a prime (70502563) 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 in 3 ways as a sum of consecutive naturals, for example, 665066 + ... + 665171.

It is an arithmetic number, because the mean of its divisors is an integer number (17958213).

Almost surely, 2^70502561 is an apocalyptic number.

It is an amenable number.

70502561 is a deficient number, since it is larger than the sum of its proper divisors (1330291).

70502561 is a wasteful number, since it uses less digits than its factorization.

70502561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330290.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 70502561 is about 8396.5803158191. The cubic root of 70502561 is about 413.1124634364.

The spelling of 70502561 in words is "seventy million, five hundred two thousand, five hundred sixty-one".