123315601 has 2 divisors, whose sum is σ = 123315602. Its totient is φ = 123315600.

The previous prime is 123315593. The next prime is 123315607. The reversal of 123315601 is 106513321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92179201 + 31136400 = 9601^2 + 5580^2 .

It is a cyclic number.

It is not a de Polignac number, because 123315601 - 2³ = 123315593 is a prime.

It is not a weakly prime, because it can be changed into another prime (123315607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61657800 + 61657801.

It is an arithmetic number, because the mean of its divisors is an integer number (61657801).

Almost surely, 2^123315601 is an apocalyptic number.

It is an amenable number.

123315601 is a deficient number, since it is larger than the sum of its proper divisors (1).

123315601 is an equidigital number, since it uses as much as digits as its factorization.

123315601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 123315601 is about 11104.7557829968. The cubic root of 123315601 is about 497.7439706396.

Adding to 123315601 its reverse (106513321), we get a palindrome (229828922).

The spelling of 123315601 in words is "one hundred twenty-three million, three hundred fifteen thousand, six hundred one".