851401771 has 8 divisors (see below), whose sum is σ = 929034288. Its totient is φ = 773808000.

The previous prime is 851401753. The next prime is 851401813. The reversal of 851401771 is 177104158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851401771 - 2¹⁵ = 851369003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851401751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55191 + ... + 68911.

It is an arithmetic number, because the mean of its divisors is an integer number (116129286).

Almost surely, 2^851401771 is an apocalyptic number.

851401771 is a deficient number, since it is larger than the sum of its proper divisors (77632517).

851401771 is a wasteful number, since it uses less digits than its factorization.

851401771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19373.

The product of its (nonzero) digits is 7840, while the sum is 34.

The square root of 851401771 is about 29178.7897452927. The cubic root of 851401771 is about 947.7886779202.

It can be divided in two parts, 85 and 1401771, that added together give a square (1401856 = 1184²).

The spelling of 851401771 in words is "eight hundred fifty-one million, four hundred one thousand, seven hundred seventy-one".