851057 has 2 divisors, whose sum is σ = 851058. Its totient is φ = 851056.

The previous prime is 851051. The next prime is 851087. The reversal of 851057 is 750158.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 758641 + 92416 = 871^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 851057 - 2⁴ = 851041 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (851051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 425528 + 425529.

It is an arithmetic number, because the mean of its divisors is an integer number (425529).

2⁸⁵¹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

851057 is a deficient number, since it is larger than the sum of its proper divisors (1).

851057 is an equidigital number, since it uses as much as digits as its factorization.

851057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 851057 is about 922.5275063650. The cubic root of 851057 is about 94.7660726511.

The spelling of 851057 in words is "eight hundred fifty-one thousand, fifty-seven".