123450140245 has 4 divisors (see below), whose sum is σ = 148140168300. Its totient is φ = 98760112192.

The previous prime is 123450140243. The next prime is 123450140287. The reversal of 123450140245 is 542041054321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 542041054321 = 13 ⋅41695465717.

It can be written as a sum of positive squares in 2 ways, for example, as 50804258404 + 72645881841 = 225398^2 + 269529^2 .

It is a cyclic number.

It is not a de Polignac number, because 123450140245 - 2¹ = 123450140243 is a prime.

It is a super-4 number, since 4×123450140245⁴ (a number of 45 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123450140243) 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, 12345014020 + ... + 12345014029.

It is an arithmetic number, because the mean of its divisors is an integer number (37035042075).

Almost surely, 2^123450140245 is an apocalyptic number.

It is an amenable number.

123450140245 is a deficient number, since it is larger than the sum of its proper divisors (24690028055).

123450140245 is an equidigital number, since it uses as much as digits as its factorization.

123450140245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24690028054.

The product of its (nonzero) digits is 19200, while the sum is 31.

Adding to 123450140245 its reverse (542041054321), we get a palindrome (665491194566).

The spelling of 123450140245 in words is "one hundred twenty-three billion, four hundred fifty million, one hundred forty thousand, two hundred forty-five".