249094721 has 8 divisors (see below), whose sum is σ = 255379488. Its totient is φ = 242820000.

The previous prime is 249094711. The next prime is 249094759. The reversal of 249094721 is 127490942.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-249094721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249094711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85946 + ... + 88796.

It is an arithmetic number, because the mean of its divisors is an integer number (31922436).

Almost surely, 2^249094721 is an apocalyptic number.

It is an amenable number.

249094721 is a deficient number, since it is larger than the sum of its proper divisors (6284767).

249094721 is a wasteful number, since it uses less digits than its factorization.

249094721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5023.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 249094721 is about 15782.7349024179. The cubic root of 249094721 is about 629.1992185683.

The spelling of 249094721 in words is "two hundred forty-nine million, ninety-four thousand, seven hundred twenty-one".