70290565 has 16 divisors (see below), whose sum is σ = 87543792. Its totient is φ = 54134784.

The previous prime is 70290559. The next prime is 70290569. The reversal of 70290565 is 56509207.

It can be written as a sum of positive squares in 8 ways, for example, as 6066369 + 64224196 = 2463^2 + 8014^2 .

It is a cyclic number.

It is not a de Polignac number, because 70290565 - 2⁵ = 70290533 is a prime.

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 70290565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70290569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15987 + ... + 19903.

It is an arithmetic number, because the mean of its divisors is an integer number (5471487).

Almost surely, 2^70290565 is an apocalyptic number.

It is an amenable number.

70290565 is a deficient number, since it is larger than the sum of its proper divisors (17253227).

70290565 is a wasteful number, since it uses less digits than its factorization.

70290565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4056.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 70290565 is about 8383.9468629041. The cubic root of 70290565 is about 412.6979814854.

The spelling of 70290565 in words is "seventy million, two hundred ninety thousand, five hundred sixty-five".