151686 has 24 divisors (see below), whose sum is σ = 343560. Its totient is φ = 49608.

The previous prime is 151681. The next prime is 151687. The reversal of 151686 is 686151.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151681) by changing a digit.

151686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2836 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (14315).

2¹⁵¹⁶⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 151686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171780).

151686 is an abundant number, since it is smaller than the sum of its proper divisors (191874).

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

151686 is an equidigital number, since it uses as much as digits as its factorization.

151686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 58 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 151686 is about 389.4688691025. The cubic root of 151686 is about 53.3312585998.

The spelling of 151686 in words is "one hundred fifty-one thousand, six hundred eighty-six".