55642 has 8 divisors (see below), whose sum is σ = 85536. Its totient is φ = 27132.

The previous prime is 55639. The next prime is 55661. The reversal of 55642 is 24655.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238 + ... + 409.

It is an arithmetic number, because the mean of its divisors is an integer number (10692).

2⁵⁵⁶⁴² is an apocalyptic number.

55642 is a deficient number, since it is larger than the sum of its proper divisors (29894).

55642 is a wasteful number, since it uses less digits than its factorization.

55642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692.

The product of its digits is 1200, while the sum is 22.

The square root of 55642 is about 235.8855654761. The cubic root of 55642 is about 38.1769219998.

The spelling of 55642 in words is "fifty-five thousand, six hundred forty-two".