249420 has 24 divisors (see below), whose sum is σ = 698544. Its totient is φ = 66496.

The previous prime is 249419. The next prime is 249421. The reversal of 249420 is 24942.

It is an interprime number because it is at equal distance from previous prime (249419) and next prime (249421).

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 7 ways as a sum of consecutive naturals, for example, 2019 + ... + 2138.

It is an arithmetic number, because the mean of its divisors is an integer number (29106).

2²⁴⁹⁴²⁰ is an apocalyptic number.

249420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

249420 is an abundant number, since it is smaller than the sum of its proper divisors (449124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249420 is a wasteful number, since it uses less digits than its factorization.

249420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4169 (or 4167 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 249420 is about 499.4196632092. The cubic root of 249420 is about 62.9472978244.

The spelling of 249420 in words is "two hundred forty-nine thousand, four hundred twenty".