123126449 has 4 divisors (see below), whose sum is σ = 123154164. Its totient is φ = 123098736.

The previous prime is 123126439. The next prime is 123126463. The reversal of 123126449 is 944621321.

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

It can be written as a sum of positive squares in 2 ways, for example, as 111154849 + 11971600 = 10543^2 + 3460^2 .

It is a cyclic number.

It is not a de Polignac number, because 123126449 - 2¹² = 123122353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123126439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522 + ... + 16635.

It is an arithmetic number, because the mean of its divisors is an integer number (30788541).

Almost surely, 2^123126449 is an apocalyptic number.

It is an amenable number.

123126449 is a deficient number, since it is larger than the sum of its proper divisors (27715).

123126449 is an equidigital number, since it uses as much as digits as its factorization.

123126449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27714.

The product of its digits is 10368, while the sum is 32.

The square root of 123126449 is about 11096.2358031902. The cubic root of 123126449 is about 497.4893463372.

The spelling of 123126449 in words is "one hundred twenty-three million, one hundred twenty-six thousand, four hundred forty-nine".