1251160681 has 2 divisors, whose sum is σ = 1251160682. Its totient is φ = 1251160680.

The previous prime is 1251160663. The next prime is 1251160699. The reversal of 1251160681 is 1860611521.

It is a balanced prime because it is at equal distance from previous prime (1251160663) and next prime (1251160699).

It can be written as a sum of positive squares in only one way, i.e., 937339456 + 313821225 = 30616^2 + 17715^2 .

It is a cyclic number.

It is not a de Polignac number, because 1251160681 - 2¹¹ = 1251158633 is a prime.

It is a super-2 number, since 2×1251160681² = 3130806099360767522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1251160381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 625580340 + 625580341.

It is an arithmetic number, because the mean of its divisors is an integer number (625580341).

Almost surely, 2^1251160681 is an apocalyptic number.

It is an amenable number.

1251160681 is a deficient number, since it is larger than the sum of its proper divisors (1).

1251160681 is an equidigital number, since it uses as much as digits as its factorization.

1251160681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 31.

The square root of 1251160681 is about 35371.7497588118. The cubic root of 1251160681 is about 1077.5506567270.

The spelling of 1251160681 in words is "one billion, two hundred fifty-one million, one hundred sixty thousand, six hundred eighty-one".