249740201 has 4 divisors (see below), whose sum is σ = 249875412. Its totient is φ = 249604992.

The previous prime is 249740191. The next prime is 249740209. The reversal of 249740201 is 102047942.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125440000 + 124300201 = 11200^2 + 11149^2 .

It is a cyclic number.

It is not a de Polignac number, because 249740201 - 2⁶ = 249740137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (249740209) 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 3 ways as a sum of consecutive naturals, for example, 64796 + ... + 68541.

It is an arithmetic number, because the mean of its divisors is an integer number (62468853).

Almost surely, 2^249740201 is an apocalyptic number.

It is an amenable number.

249740201 is a deficient number, since it is larger than the sum of its proper divisors (135211).

249740201 is a wasteful number, since it uses less digits than its factorization.

249740201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135210.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 249740201 is about 15803.1705995980. The cubic root of 249740201 is about 629.7422318276.

The spelling of 249740201 in words is "two hundred forty-nine million, seven hundred forty thousand, two hundred one".