851542 has 8 divisors (see below), whose sum is σ = 1344600. Its totient is φ = 403344.

The previous prime is 851537. The next prime is 851549. The reversal of 851542 is 245158.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851549) by changing a digit.

851542 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11167 + ... + 11242.

It is an arithmetic number, because the mean of its divisors is an integer number (168075).

2⁸⁵¹⁵⁴² is an apocalyptic number.

851542 is a deficient number, since it is larger than the sum of its proper divisors (493058).

851542 is a wasteful number, since it uses less digits than its factorization.

851542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22430.

The product of its digits is 1600, while the sum is 25.

The square root of 851542 is about 922.7903337162. The cubic root of 851542 is about 94.7840709823.

The spelling of 851542 in words is "eight hundred fifty-one thousand, five hundred forty-two".