253966 has 8 divisors (see below), whose sum is σ = 397584. Its totient is φ = 121440.

The previous prime is 253951. The next prime is 253969. The reversal of 253966 is 669352.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2715 + ... + 2806.

It is an arithmetic number, because the mean of its divisors is an integer number (49698).

2²⁵³⁹⁶⁶ is an apocalyptic number.

253966 is a deficient number, since it is larger than the sum of its proper divisors (143618).

253966 is a wasteful number, since it uses less digits than its factorization.

253966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5546.

The product of its digits is 9720, while the sum is 31.

The square root of 253966 is about 503.9503943842. The cubic root of 253966 is about 63.3274294281.

The spelling of 253966 in words is "two hundred fifty-three thousand, nine hundred sixty-six".