249157 has 8 divisors (see below), whose sum is σ = 262080. Its totient is φ = 236640.

The previous prime is 249143. The next prime is 249181. The reversal of 249157 is 751942.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249157 is a prime.

It is an Ulam number.

It is a Duffinian number.

249157 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249107) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2368 + ... + 2470.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2²⁴⁹¹⁵⁷ is an apocalyptic number.

It is an amenable number.

249157 is a deficient number, since it is larger than the sum of its proper divisors (12923).

249157 is a wasteful number, since it uses less digits than its factorization.

249157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203.

The product of its digits is 2520, while the sum is 28.

The square root of 249157 is about 499.1562881503. The cubic root of 249157 is about 62.9251651946.

It can be divided in two parts, 249 and 157, that multiplied together give a palindrome (39093).

The spelling of 249157 in words is "two hundred forty-nine thousand, one hundred fifty-seven".