249401 has 4 divisors (see below), whose sum is σ = 250404. Its totient is φ = 248400.
The previous prime is 249397. The next prime is 249419. The reversal of 249401 is 104942.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It can be written as a sum of positive squares in 2 ways, for example, as 89401 + 160000 = 299^2 + 400^2 .
It is a cyclic number.
It is not a de Polignac number, because 249401 - 22 = 249397 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249401.
It is not an unprimeable number, because it can be changed into a prime (249421) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191 + ... + 731.
It is an arithmetic number, because the mean of its divisors is an integer number (62601).
2249401 is an apocalyptic number.
It is an amenable number.
249401 is a deficient number, since it is larger than the sum of its proper divisors (1003).
249401 is an equidigital number, since it uses as much as digits as its factorization.
249401 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1002.
The product of its (nonzero) digits is 288, while the sum is 20.
The square root of 249401 is about 499.4006407685. The cubic root of 249401 is about 62.9456994107.
The spelling of 249401 in words is "two hundred forty-nine thousand, four hundred one".
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