653942 has 8 divisors (see below), whose sum is σ = 1032600. Its totient is φ = 309744.

The previous prime is 653941. The next prime is 653951. The reversal of 653942 is 249356.

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

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653942.

It is not an unprimeable number, because it can be changed into a prime (653941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8567 + ... + 8642.

It is an arithmetic number, because the mean of its divisors is an integer number (129075).

2⁶⁵³⁹⁴² is an apocalyptic number.

653942 is a deficient number, since it is larger than the sum of its proper divisors (378658).

653942 is a wasteful number, since it uses less digits than its factorization.

653942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17230.

The product of its digits is 6480, while the sum is 29.

The square root of 653942 is about 808.6668040670. Note that the first 3 decimals coincide. The cubic root of 653942 is about 86.7986712900.

The spelling of 653942 in words is "six hundred fifty-three thousand, nine hundred forty-two".