135644 has 6 divisors (see below), whose sum is σ = 237384. Its totient is φ = 67820.

The previous prime is 135637. The next prime is 135647. The reversal of 135644 is 446531.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16952 + ... + 16959.

It is an arithmetic number, because the mean of its divisors is an integer number (39564).

2¹³⁵⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

135644 is a deficient number, since it is larger than the sum of its proper divisors (101740).

135644 is a wasteful number, since it uses less digits than its factorization.

135644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33915 (or 33913 counting only the distinct ones).

The product of its digits is 1440, while the sum is 23.

The square root of 135644 is about 368.2987917439. The cubic root of 135644 is about 51.3807212190.

The spelling of 135644 in words is "one hundred thirty-five thousand, six hundred forty-four".