245254123 has 4 divisors (see below), whose sum is σ = 246538368. Its totient is φ = 243969880.

The previous prime is 245254117. The next prime is 245254151. The reversal of 245254123 is 321452542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321452542 = 2 ⋅160726271.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245254123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245254091 and 245254100.

It is not an unprimeable number, because it can be changed into a prime (245254193) 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, 641836 + ... + 642217.

It is an arithmetic number, because the mean of its divisors is an integer number (61634592).

Almost surely, 2^245254123 is an apocalyptic number.

245254123 is a deficient number, since it is larger than the sum of its proper divisors (1284245).

245254123 is a wasteful number, since it uses less digits than its factorization.

245254123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284244.

The product of its digits is 9600, while the sum is 28.

The square root of 245254123 is about 15660.5914000717. The cubic root of 245254123 is about 625.9487440468.

The spelling of 245254123 in words is "two hundred forty-five million, two hundred fifty-four thousand, one hundred twenty-three".