249442 has 4 divisors (see below), whose sum is σ = 374166. Its totient is φ = 124720.

The previous prime is 249439. The next prime is 249449. The reversal of 249442 is 244942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244942 = 2 ⋅122471.

It can be written as a sum of positive squares in only one way, i.e., 249001 + 441 = 499^2 + 21^2 .

It is a super-2 number, since 2×249442² = 124442622728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62359 + ... + 62362.

2²⁴⁹⁴⁴² is an apocalyptic number.

249442 is a deficient number, since it is larger than the sum of its proper divisors (124724).

249442 is a wasteful number, since it uses less digits than its factorization.

249442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124723.

The product of its digits is 2304, while the sum is 25.

The square root of 249442 is about 499.4416882880. The cubic root of 249442 is about 62.9491485178.

The spelling of 249442 in words is "two hundred forty-nine thousand, four hundred forty-two".