251002 has 8 divisors (see below), whose sum is σ = 385812. Its totient is φ = 122400.

The previous prime is 250993. The next prime is 251003. The reversal of 251002 is 200152.

251002 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 501²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 251001 + 1 = 501^2 + 1^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 251002.

It is not an unprimeable number, because it can be changed into a prime (251003) 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 3 ways as a sum of consecutive naturals, for example, 1449 + ... + 1612.

251002 is a Friedman number, since it can be written as 501^2+2^0, using all its digits and the basic arithmetic operations.

2²⁵¹⁰⁰² is an apocalyptic number.

251002 is a deficient number, since it is larger than the sum of its proper divisors (134810).

251002 is a wasteful number, since it uses less digits than its factorization.

251002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3104.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 251002 is about 501.0009980030. Note that the first 3 decimals coincide. The cubic root of 251002 is about 63.0801030292.

Adding to 251002 its reverse (200152), we get a palindrome (451154).

The spelling of 251002 in words is "two hundred fifty-one thousand, two".