851277492 has 48 divisors (see below), whose sum is σ = 2376790080. Its totient is φ = 261931104.

The previous prime is 851277487. The next prime is 851277517. The reversal of 851277492 is 294772158.

It is a happy number.

851277492 is a `hidden beast` number, since 85 + 12 + 77 + 492 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301758 + ... + 304565.

It is an arithmetic number, because the mean of its divisors is an integer number (49516460).

Almost surely, 2^851277492 is an apocalyptic number.

It is an amenable number.

851277492 is an abundant number, since it is smaller than the sum of its proper divisors (1525512588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

851277492 is a wasteful number, since it uses less digits than its factorization.

851277492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606349 (or 606341 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 851277492 is about 29176.6600555992. The cubic root of 851277492 is about 947.7425594817.

The spelling of 851277492 in words is "eight hundred fifty-one million, two hundred seventy-seven thousand, four hundred ninety-two".