249770 has 8 divisors (see below), whose sum is σ = 449604. Its totient is φ = 99904.

The previous prime is 249763. The next prime is 249779. The reversal of 249770 is 77942.

249770 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 212521 + 37249 = 461^2 + 193^2 .

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

It is not an unprimeable number, because it can be changed into a prime (249779) 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, 12479 + ... + 12498.

2²⁴⁹⁷⁷⁰ is an apocalyptic number.

249770 is a deficient number, since it is larger than the sum of its proper divisors (199834).

249770 is a wasteful number, since it uses less digits than its factorization.

249770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24984.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 249770 is about 499.7699470757. The cubic root of 249770 is about 62.9767277779.

The spelling of 249770 in words is "two hundred forty-nine thousand, seven hundred seventy".