245403123 has 32 divisors (see below), whose sum is σ = 398208000. Its totient is φ = 134120448.

The previous prime is 245403101. The next prime is 245403139. The reversal of 245403123 is 321304542.

It is not a de Polignac number, because 245403123 - 2¹² = 245399027 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245403093 and 245403102.

It is not an unprimeable number, because it can be changed into a prime (245403173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18483 + ... + 28851.

It is an arithmetic number, because the mean of its divisors is an integer number (12444000).

Almost surely, 2^245403123 is an apocalyptic number.

245403123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

245403123 is a deficient number, since it is larger than the sum of its proper divisors (152804877).

245403123 is a wasteful number, since it uses less digits than its factorization.

245403123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10416 (or 10402 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 245403123 is about 15665.3478416536. The cubic root of 245403123 is about 626.0754799139.

Adding to 245403123 its reverse (321304542), we get a palindrome (566707665).

The spelling of 245403123 in words is "two hundred forty-five million, four hundred three thousand, one hundred twenty-three".