851252761 has 2 divisors, whose sum is σ = 851252762. Its totient is φ = 851252760.

The previous prime is 851252741. The next prime is 851252789. The reversal of 851252761 is 167252158.

851252761 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 611622361 + 239630400 = 24731^2 + 15480^2 .

It is a cyclic number.

It is not a de Polignac number, because 851252761 - 2⁹ = 851252249 is a prime.

It is a super-2 number, since 2×851252761² = 1449262526220246242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 851252761.

It is not a weakly prime, because it can be changed into another prime (851252711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425626380 + 425626381.

It is an arithmetic number, because the mean of its divisors is an integer number (425626381).

Almost surely, 2^851252761 is an apocalyptic number.

It is an amenable number.

851252761 is a deficient number, since it is larger than the sum of its proper divisors (1).

851252761 is an equidigital number, since it uses as much as digits as its factorization.

851252761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 37.

The square root of 851252761 is about 29176.2362377329. The cubic root of 851252761 is about 947.7333815702.

The spelling of 851252761 in words is "eight hundred fifty-one million, two hundred fifty-two thousand, seven hundred sixty-one".