249451 has 6 divisors (see below), whose sum is σ = 263652. Its totient is φ = 235980.

The previous prime is 249449. The next prime is 249463. The reversal of 249451 is 154942.

It is not a de Polignac number, because 249451 - 2¹ = 249449 is a prime.

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 5 ways as a sum of consecutive naturals, for example, 16 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (43942).

2²⁴⁹⁴⁵¹ is an apocalyptic number.

249451 is a deficient number, since it is larger than the sum of its proper divisors (14201).

249451 is an equidigital number, since it uses as much as digits as its factorization.

249451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729 (or 710 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 249451 is about 499.4506982676. The cubic root of 249451 is about 62.9499055883.

The spelling of 249451 in words is "two hundred forty-nine thousand, four hundred fifty-one".