12403738 has 4 divisors (see below), whose sum is σ = 18605610. Its totient is φ = 6201868.

The previous prime is 12403733. The next prime is 12403753. The reversal of 12403738 is 83730421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83730421 = 109 ⋅768169.

It can be written as a sum of positive squares in only one way, i.e., 9591409 + 2812329 = 3097^2 + 1677^2 .

It is not an unprimeable number, because it can be changed into a prime (12403733) by changing a digit.

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, 3100933 + ... + 3100936.

Almost surely, 2^12403738 is an apocalyptic number.

12403738 is a deficient number, since it is larger than the sum of its proper divisors (6201872).

12403738 is an equidigital number, since it uses as much as digits as its factorization.

12403738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201871.

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 12403738 is about 3521.8940926723. The cubic root of 12403738 is about 231.4821610027.

The spelling of 12403738 in words is "twelve million, four hundred three thousand, seven hundred thirty-eight".