245242543 has 8 divisors (see below), whose sum is σ = 301837088. Its totient is φ = 194037984.

The previous prime is 245242541. The next prime is 245242553. The reversal of 245242543 is 345242542.

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

It is not a de Polignac number, because 245242543 - 2¹ = 245242541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245242541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1347396 + ... + 1347577.

It is an arithmetic number, because the mean of its divisors is an integer number (37729636).

Almost surely, 2^245242543 is an apocalyptic number.

245242543 is a deficient number, since it is larger than the sum of its proper divisors (56594545).

245242543 is a wasteful number, since it uses less digits than its factorization.

245242543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2694993.

The product of its digits is 38400, while the sum is 31.

The square root of 245242543 is about 15660.2216778691. The cubic root of 245242543 is about 625.9388922240.

Subtracting 245242543 from its reverse (345242542), we obtain a palindrome (99999999).

The spelling of 245242543 in words is "two hundred forty-five million, two hundred forty-two thousand, five hundred forty-three".