249121487 has 8 divisors (see below), whose sum is σ = 268339200. Its totient is φ = 230602680.

The previous prime is 249121469. The next prime is 249121501. The reversal of 249121487 is 784121942.

It is a happy number.

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 249121487 - 2¹⁰ = 249120463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 249121487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (249121427) 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 7 ways as a sum of consecutive naturals, for example, 173987 + ... + 175412.

It is an arithmetic number, because the mean of its divisors is an integer number (33542400).

Almost surely, 2^249121487 is an apocalyptic number.

249121487 is a deficient number, since it is larger than the sum of its proper divisors (19217713).

249121487 is a wasteful number, since it uses less digits than its factorization.

249121487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349453.

The product of its digits is 32256, while the sum is 38.

The square root of 249121487 is about 15783.5828315373. The cubic root of 249121487 is about 629.2217542300.

The spelling of 249121487 in words is "two hundred forty-nine million, one hundred twenty-one thousand, four hundred eighty-seven".