123742436 has 6 divisors (see below), whose sum is σ = 216549270. Its totient is φ = 61871216.

The previous prime is 123742429. The next prime is 123742447. The reversal of 123742436 is 634247321.

It can be written as a sum of positive squares in only one way, i.e., 85673536 + 38068900 = 9256^2 + 6170^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15467801 + ... + 15467808.

It is an arithmetic number, because the mean of its divisors is an integer number (36091545).

Almost surely, 2^123742436 is an apocalyptic number.

It is an amenable number.

123742436 is a deficient number, since it is larger than the sum of its proper divisors (92806834).

123742436 is a wasteful number, since it uses less digits than its factorization.

123742436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30935613 (or 30935611 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The square root of 123742436 is about 11123.9577489309. The cubic root of 123742436 is about 498.3175933652.

Adding to 123742436 its reverse (634247321), we get a palindrome (757989757).

The spelling of 123742436 in words is "one hundred twenty-three million, seven hundred forty-two thousand, four hundred thirty-six".