842151 has 4 divisors (see below), whose sum is σ = 1122872. Its totient is φ = 561432.

The previous prime is 842147. The next prime is 842159. The reversal of 842151 is 151248.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 842151 - 2² = 842147 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842151.

It is not an unprimeable number, because it can be changed into a prime (842159) 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, 140356 + ... + 140361.

It is an arithmetic number, because the mean of its divisors is an integer number (280718).

2⁸⁴²¹⁵¹ is an apocalyptic number.

842151 is a deficient number, since it is larger than the sum of its proper divisors (280721).

842151 is a wasteful number, since it uses less digits than its factorization.

842151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280720.

The product of its digits is 320, while the sum is 21.

The square root of 842151 is about 917.6878554280. The cubic root of 842151 is about 94.4343487350.

Adding to 842151 its reverse (151248), we get a palindrome (993399).

The spelling of 842151 in words is "eight hundred forty-two thousand, one hundred fifty-one".