249752505 has 8 divisors (see below), whose sum is σ = 399604032. Its totient is φ = 133201328.

The previous prime is 249752453. The next prime is 249752509. The reversal of 249752505 is 505257942.

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 249752505 - 2⁶ = 249752441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (249752509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8325069 + ... + 8325098.

It is an arithmetic number, because the mean of its divisors is an integer number (49950504).

Almost surely, 2^249752505 is an apocalyptic number.

It is an amenable number.

249752505 is a deficient number, since it is larger than the sum of its proper divisors (149851527).

249752505 is a wasteful number, since it uses less digits than its factorization.

249752505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16650175.

The product of its (nonzero) digits is 126000, while the sum is 39.

The square root of 249752505 is about 15803.5598837730. The cubic root of 249752505 is about 629.7525735363.

The spelling of 249752505 in words is "two hundred forty-nine million, seven hundred fifty-two thousand, five hundred five".