123001243 has 2 divisors, whose sum is σ = 123001244. Its totient is φ = 123001242.

The previous prime is 123001237. The next prime is 123001259. The reversal of 123001243 is 342100321.

It is a happy number.

It is an a-pointer prime, because the next prime (123001259) can be obtained adding 123001243 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 123001243 - 2¹³ = 122993051 is a prime.

It is a super-3 number, since 3×123001243³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (123001223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61500621 + 61500622.

It is an arithmetic number, because the mean of its divisors is an integer number (61500622).

Almost surely, 2^123001243 is an apocalyptic number.

123001243 is a deficient number, since it is larger than the sum of its proper divisors (1).

123001243 is an equidigital number, since it uses as much as digits as its factorization.

123001243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 123001243 is about 11090.5925450356. The cubic root of 123001243 is about 497.3206585719.

Adding to 123001243 its reverse (342100321), we get a palindrome (465101564).

The spelling of 123001243 in words is "one hundred twenty-three million, one thousand, two hundred forty-three".