840131 has 8 divisors (see below), whose sum is σ = 889728. Its totient is φ = 792000.

The previous prime is 840109. The next prime is 840137. The reversal of 840131 is 131048.

It is a happy number.

840131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 840131 - 2⁶ = 840067 is a prime.

It is a super-2 number, since 2×840131² = 1411640194322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840137) 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, 941 + ... + 1601.

It is an arithmetic number, because the mean of its divisors is an integer number (111216).

2⁸⁴⁰¹³¹ is an apocalyptic number.

840131 is a deficient number, since it is larger than the sum of its proper divisors (49597).

840131 is a wasteful number, since it uses less digits than its factorization.

840131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 840131 is about 916.5866025641. The cubic root of 840131 is about 94.3587842554.

Adding to 840131 its reverse (131048), we get a palindrome (971179).

The spelling of 840131 in words is "eight hundred forty thousand, one hundred thirty-one".