851642 has 8 divisors (see below), whose sum is σ = 1393632. Its totient is φ = 387100.

The previous prime is 851639. The next prime is 851647. The reversal of 851642 is 246158.

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

It is not an unprimeable number, because it can be changed into a prime (851647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19334 + ... + 19377.

It is an arithmetic number, because the mean of its divisors is an integer number (174204).

2⁸⁵¹⁶⁴² is an apocalyptic number.

851642 is a deficient number, since it is larger than the sum of its proper divisors (541990).

851642 is a wasteful number, since it uses less digits than its factorization.

851642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38724.

The product of its digits is 1920, while the sum is 26.

The square root of 851642 is about 922.8445156146. The cubic root of 851642 is about 94.7877811286.

It can be divided in two parts, 8516 and 42, that added together give a palindrome (8558).

The spelling of 851642 in words is "eight hundred fifty-one thousand, six hundred forty-two".