249998405 has 8 divisors (see below), whose sum is σ = 306381312. Its totient is φ = 195743248.

The previous prime is 249998377. The next prime is 249998429. The reversal of 249998405 is 504899942.

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 249998405 - 2¹⁴ = 249982021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 531677 + ... + 532146.

It is an arithmetic number, because the mean of its divisors is an integer number (38297664).

Almost surely, 2^249998405 is an apocalyptic number.

It is an amenable number.

249998405 is a deficient number, since it is larger than the sum of its proper divisors (56382907).

249998405 is a wasteful number, since it uses less digits than its factorization.

249998405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063875.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 249998405 is about 15811.3378624328. The cubic root of 249998405 is about 629.9591852285.

The spelling of 249998405 in words is "two hundred forty-nine million, nine hundred ninety-eight thousand, four hundred five".