70561145 has 4 divisors (see below), whose sum is σ = 84673380. Its totient is φ = 56448912.

The previous prime is 70561129. The next prime is 70561157. The reversal of 70561145 is 54116507.

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 52954729 + 17606416 = 7277^2 + 4196^2 .

It is a cyclic number.

It is not a de Polignac number, because 70561145 - 2⁴ = 70561129 is a prime.

It is a super-2 number, since 2×70561145² = 9957750367422050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7056110 + ... + 7056119.

It is an arithmetic number, because the mean of its divisors is an integer number (21168345).

Almost surely, 2^70561145 is an apocalyptic number.

It is an amenable number.

70561145 is a deficient number, since it is larger than the sum of its proper divisors (14112235).

70561145 is a wasteful number, since it uses less digits than its factorization.

70561145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14112234.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 70561145 is about 8400.0681544854. The cubic root of 70561145 is about 413.2268568232.

The spelling of 70561145 in words is "seventy million, five hundred sixty-one thousand, one hundred forty-five".