251341121 has 4 divisors (see below), whose sum is σ = 255601200. Its totient is φ = 247081044.

The previous prime is 251341093. The next prime is 251341127. The reversal of 251341121 is 121143152.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 251341121 - 2¹⁰ = 251340097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 251341093 and 251341102.

It is not an unprimeable number, because it can be changed into a prime (251341127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2129951 + ... + 2130068.

It is an arithmetic number, because the mean of its divisors is an integer number (63900300).

Almost surely, 2^251341121 is an apocalyptic number.

It is an amenable number.

251341121 is a deficient number, since it is larger than the sum of its proper divisors (4260079).

251341121 is an equidigital number, since it uses as much as digits as its factorization.

251341121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260078.

The product of its digits is 240, while the sum is 20.

The square root of 251341121 is about 15853.7415457677. The cubic root of 251341121 is about 631.0849876695.

Adding to 251341121 its reverse (121143152), we get a palindrome (372484273).

It can be divided in two parts, 2513 and 41121, that added together give a palindrome (43634).

The spelling of 251341121 in words is "two hundred fifty-one million, three hundred forty-one thousand, one hundred twenty-one".