249142 has 8 divisors (see below), whose sum is σ = 382536. Its totient is φ = 121632.

The previous prime is 249133. The next prime is 249143. The reversal of 249142 is 241942.

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 (249143) by changing a digit.

249142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1363 + ... + 1534.

It is an arithmetic number, because the mean of its divisors is an integer number (47817).

2²⁴⁹¹⁴² is an apocalyptic number.

249142 is a deficient number, since it is larger than the sum of its proper divisors (133394).

249142 is a wasteful number, since it uses less digits than its factorization.

249142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2942.

The product of its digits is 576, while the sum is 22.

The square root of 249142 is about 499.1412625700. The cubic root of 249142 is about 62.9239024079.

The spelling of 249142 in words is "two hundred forty-nine thousand, one hundred forty-two".