123105242 has 8 divisors (see below), whose sum is σ = 198862356. Its totient is φ = 56817792.

The previous prime is 123105239. The next prime is 123105263. The reversal of 123105242 is 242501321.

It can be written as a sum of positive squares in 2 ways, for example, as 121198081 + 1907161 = 11009^2 + 1381^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2367383 + ... + 2367434.

Almost surely, 2^123105242 is an apocalyptic number.

123105242 is a deficient number, since it is larger than the sum of its proper divisors (75757114).

123105242 is a wasteful number, since it uses less digits than its factorization.

123105242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4734832.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 123105242 is about 11095.2801677110. The cubic root of 123105242 is about 497.4607825790.

Adding to 123105242 its reverse (242501321), we get a palindrome (365606563).

The spelling of 123105242 in words is "one hundred twenty-three million, one hundred five thousand, two hundred forty-two".