249481 has 4 divisors (see below), whose sum is σ = 260352. Its totient is φ = 238612.

The previous prime is 249463. The next prime is 249497. The reversal of 249481 is 184942.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 249481 - 2⁵ = 249449 is a prime.

It is a super-2 number, since 2×249481² = 124481538722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (249421) 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, 5401 + ... + 5446.

It is an arithmetic number, because the mean of its divisors is an integer number (65088).

2²⁴⁹⁴⁸¹ is an apocalyptic number.

It is an amenable number.

249481 is a deficient number, since it is larger than the sum of its proper divisors (10871).

249481 is a wasteful number, since it uses less digits than its factorization.

249481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10870.

The product of its digits is 2304, while the sum is 28.

The square root of 249481 is about 499.4807303590. The cubic root of 249481 is about 62.9524290250.

The spelling of 249481 in words is "two hundred forty-nine thousand, four hundred eighty-one".