249606421 has 8 divisors (see below), whose sum is σ = 251596800. Its totient is φ = 247623120.

The previous prime is 249606397. The next prime is 249606431. The reversal of 249606421 is 124606942.

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 249606421 - 2¹¹ = 249604373 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 (249606431) 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, 85260 + ... + 88138.

It is an arithmetic number, because the mean of its divisors is an integer number (31449600).

Almost surely, 2^249606421 is an apocalyptic number.

It is an amenable number.

249606421 is a deficient number, since it is larger than the sum of its proper divisors (1990379).

249606421 is a wasteful number, since it uses less digits than its factorization.

249606421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 249606421 is about 15798.9373376819. The cubic root of 249606421 is about 629.6297656689.

The spelling of 249606421 in words is "two hundred forty-nine million, six hundred six thousand, four hundred twenty-one".