136881 has 12 divisors (see below), whose sum is σ = 201552. Its totient is φ = 89496.

The previous prime is 136879. The next prime is 136883. The reversal of 136881 is 188631.

It is an interprime number because it is at equal distance from previous prime (136879) and next prime (136883).

It is not a de Polignac number, because 136881 - 2¹ = 136879 is a prime.

It is a super-2 number, since 2×136881² = 37472816322, which contains 22 as substring.

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

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (136883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 490 + ... + 716.

It is an arithmetic number, because the mean of its divisors is an integer number (16796).

2¹³⁶⁸⁸¹ is an apocalyptic number.

It is an amenable number.

136881 is a deficient number, since it is larger than the sum of its proper divisors (64671).

136881 is a wasteful number, since it uses less digits than its factorization.

136881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 297 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 136881 is about 369.9743234334. The cubic root of 136881 is about 51.5364369660.

It can be divided in two parts, 13688 and 1, that added together give a square (13689 = 117²).

The spelling of 136881 in words is "one hundred thirty-six thousand, eight hundred eighty-one".