245581243 has 2 divisors, whose sum is σ = 245581244. Its totient is φ = 245581242.

The previous prime is 245581223. The next prime is 245581249. The reversal of 245581243 is 342185542.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 245581243 - 2⁵ = 245581211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245581199 and 245581208.

It is not a weakly prime, because it can be changed into another prime (245581249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122790621 + 122790622.

It is an arithmetic number, because the mean of its divisors is an integer number (122790622).

Almost surely, 2^245581243 is an apocalyptic number.

245581243 is a deficient number, since it is larger than the sum of its proper divisors (1).

245581243 is an equidigital number, since it uses as much as digits as its factorization.

245581243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38400, while the sum is 34.

The square root of 245581243 is about 15671.0319698481. The cubic root of 245581243 is about 626.2269172624.

The spelling of 245581243 in words is "two hundred forty-five million, five hundred eighty-one thousand, two hundred forty-three".