251049 has 8 divisors (see below), whose sum is σ = 340000. Its totient is φ = 164736.

The previous prime is 251033. The next prime is 251051. The reversal of 251049 is 940152.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251049 - 2⁴ = 251033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251059) 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, 424 + ... + 825.

It is an arithmetic number, because the mean of its divisors is an integer number (42500).

2²⁵¹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

251049 is a deficient number, since it is larger than the sum of its proper divisors (88951).

251049 is a wasteful number, since it uses less digits than its factorization.

251049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1319.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 251049 is about 501.0479019016. The cubic root of 251049 is about 63.0840400228.

The spelling of 251049 in words is "two hundred fifty-one thousand, forty-nine".