123513601 has 4 divisors (see below), whose sum is σ = 123547204. Its totient is φ = 123480000.

The previous prime is 123513589. The next prime is 123513613. The reversal of 123513601 is 106315321.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (123513589) and next prime (123513613).

It can be written as a sum of positive squares in 2 ways, for example, as 10112400 + 113401201 = 3180^2 + 10649^2 .

It is a 3-Lehmer number, since φ(123513601) divides (123513601-1)³.

It is a cyclic number.

It is not a de Polignac number, because 123513601 - 2²³ = 115124993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123511601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10500 + ... + 18901.

It is an arithmetic number, because the mean of its divisors is an integer number (30886801).

Almost surely, 2^123513601 is an apocalyptic number.

It is an amenable number.

123513601 is a deficient number, since it is larger than the sum of its proper divisors (33603).

123513601 is an equidigital number, since it uses as much as digits as its factorization.

123513601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33602.

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

The square root of 123513601 is about 11113.6673065195. The cubic root of 123513601 is about 498.0102267756.

Adding to 123513601 its reverse (106315321), we get a palindrome (229828922).

The spelling of 123513601 in words is "one hundred twenty-three million, five hundred thirteen thousand, six hundred one".