249024247 has 4 divisors (see below), whose sum is σ = 257611320. Its totient is φ = 240437176.

The previous prime is 249024179. The next prime is 249024253. The reversal of 249024247 is 742420942.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742420942 = 2 ⋅371210471.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249024247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249024257) 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, 4293493 + ... + 4293550.

It is an arithmetic number, because the mean of its divisors is an integer number (64402830).

Almost surely, 2^249024247 is an apocalyptic number.

249024247 is a deficient number, since it is larger than the sum of its proper divisors (8587073).

249024247 is an equidigital number, since it uses as much as digits as its factorization.

249024247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8587072.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 249024247 is about 15780.5021149519. The cubic root of 249024247 is about 629.1398751882.

The spelling of 249024247 in words is "two hundred forty-nine million, twenty-four thousand, two hundred forty-seven".