123115541 has 4 divisors (see below), whose sum is σ = 123151392. Its totient is φ = 123079692.

The previous prime is 123115519. The next prime is 123115543. The reversal of 123115541 is 145511321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123115541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123115543) 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, 12155 + ... + 19848.

It is an arithmetic number, because the mean of its divisors is an integer number (30787848).

Almost surely, 2^123115541 is an apocalyptic number.

It is an amenable number.

123115541 is a deficient number, since it is larger than the sum of its proper divisors (35851).

123115541 is an equidigital number, since it uses as much as digits as its factorization.

123115541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35850.

The product of its digits is 600, while the sum is 23.

The square root of 123115541 is about 11095.7442742702. The cubic root of 123115541 is about 497.4746547360.

Adding to 123115541 its reverse (145511321), we get a palindrome (268626862).

The spelling of 123115541 in words is "one hundred twenty-three million, one hundred fifteen thousand, five hundred forty-one".