70251161 has 2 divisors, whose sum is σ = 70251162. Its totient is φ = 70251160.

The previous prime is 70251149. The next prime is 70251187. The reversal of 70251161 is 16115207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70241161 + 10000 = 8381^2 + 100^2 .

It is a cyclic number.

It is not a de Polignac number, because 70251161 - 2¹⁴ = 70234777 is a prime.

It is not a weakly prime, because it can be changed into another prime (70256161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35125580 + 35125581.

It is an arithmetic number, because the mean of its divisors is an integer number (35125581).

Almost surely, 2^70251161 is an apocalyptic number.

It is an amenable number.

70251161 is a deficient number, since it is larger than the sum of its proper divisors (1).

70251161 is an equidigital number, since it uses as much as digits as its factorization.

70251161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 70251161 is about 8381.5965662874. The cubic root of 70251161 is about 412.6208493176.

Adding to 70251161 its reverse (16115207), we get a palindrome (86366368).

The spelling of 70251161 in words is "seventy million, two hundred fifty-one thousand, one hundred sixty-one".