251047 has 8 divisors (see below), whose sum is σ = 269360. Its totient is φ = 233280.

The previous prime is 251033. The next prime is 251051. The reversal of 251047 is 740152.

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 251047 - 2⁷ = 250919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297 + ... + 1477.

It is an arithmetic number, because the mean of its divisors is an integer number (33670).

2²⁵¹⁰⁴⁷ is an apocalyptic number.

251047 is a deficient number, since it is larger than the sum of its proper divisors (18313).

251047 is a wasteful number, since it uses less digits than its factorization.

251047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 251047 is about 501.0459060805. The cubic root of 251047 is about 63.0838725012.

Adding to 251047 its reverse (740152), we get a palindrome (991199).

The spelling of 251047 in words is "two hundred fifty-one thousand, forty-seven".