123145244245 has 4 divisors (see below), whose sum is σ = 147774293100. Its totient is φ = 98516195392.

The previous prime is 123145244237. The next prime is 123145244333. The reversal of 123145244245 is 542442541321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40446438769 + 82698805476 = 201113^2 + 287574^2 .

It is a cyclic number.

It is not a de Polignac number, because 123145244245 - 2³ = 123145244237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12314524420 + ... + 12314524429.

It is an arithmetic number, because the mean of its divisors is an integer number (36943573275).

Almost surely, 2^123145244245 is an apocalyptic number.

It is an amenable number.

123145244245 is a deficient number, since it is larger than the sum of its proper divisors (24629048855).

123145244245 is an equidigital number, since it uses as much as digits as its factorization.

123145244245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24629048854.

The product of its digits is 153600, while the sum is 37.

Adding to 123145244245 its reverse (542442541321), we get a palindrome (665587785566).

The spelling of 123145244245 in words is "one hundred twenty-three billion, one hundred forty-five million, two hundred forty-four thousand, two hundred forty-five".