245251 has 2 divisors, whose sum is σ = 245252. Its totient is φ = 245250.

The previous prime is 245209. The next prime is 245257. The reversal of 245251 is 152542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245251 - 2¹¹ = 243203 is a prime.

245251 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (245257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122625 + 122626.

It is an arithmetic number, because the mean of its divisors is an integer number (122626).

2²⁴⁵²⁵¹ is an apocalyptic number.

245251 is a deficient number, since it is larger than the sum of its proper divisors (1).

245251 is an equidigital number, since it uses as much as digits as its factorization.

245251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 400, while the sum is 19.

The square root of 245251 is about 495.2282302131. The cubic root of 245251 is about 62.5946087148.

Adding to 245251 its reverse (152542), we get a palindrome (397793).

It can be divided in two parts, 245 and 251, that added together give a triangular number (496 = T₃₁).

The spelling of 245251 in words is "two hundred forty-five thousand, two hundred fifty-one".