249241385 has 8 divisors (see below), whose sum is σ = 302450760. Its totient is φ = 197152384.

The previous prime is 249241381. The next prime is 249241387. The reversal of 249241385 is 583142942.

It can be written as a sum of positive squares in 4 ways, for example, as 19324816 + 229916569 = 4396^2 + 15163^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 249241385 - 2² = 249241381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249241381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279602 + ... + 280491.

It is an arithmetic number, because the mean of its divisors is an integer number (37806345).

Almost surely, 2^249241385 is an apocalyptic number.

It is an amenable number.

249241385 is a deficient number, since it is larger than the sum of its proper divisors (53209375).

249241385 is an equidigital number, since it uses as much as digits as its factorization.

249241385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560187.

The product of its digits is 69120, while the sum is 38.

The square root of 249241385 is about 15787.3805617018. The cubic root of 249241385 is about 629.3226826713.

The spelling of 249241385 in words is "two hundred forty-nine million, two hundred forty-one thousand, three hundred eighty-five".