53642 has 4 divisors (see below), whose sum is σ = 80466. Its totient is φ = 26820.

The previous prime is 53639. The next prime is 53653. The reversal of 53642 is 24635.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 36481 + 17161 = 191^2 + 131^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13409 + ... + 13412.

2⁵³⁶⁴² is an apocalyptic number.

53642 is a deficient number, since it is larger than the sum of its proper divisors (26824).

53642 is a wasteful number, since it uses less digits than its factorization.

53642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26823.

The product of its digits is 720, while the sum is 20.

The square root of 53642 is about 231.6074264785. The cubic root of 53642 is about 37.7139181279.

The spelling of 53642 in words is "fifty-three thousand, six hundred forty-two".