126403345 has 4 divisors (see below), whose sum is σ = 151684020. Its totient is φ = 101122672.

The previous prime is 126403327. The next prime is 126403367. The reversal of 126403345 is 543304621.

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 47761921 + 78641424 = 6911^2 + 8868^2 .

It is a cyclic number.

It is not a de Polignac number, because 126403345 - 2⁹ = 126402833 is a prime.

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 in 3 ways as a sum of consecutive naturals, for example, 12640330 + ... + 12640339.

It is an arithmetic number, because the mean of its divisors is an integer number (37921005).

Almost surely, 2^126403345 is an apocalyptic number.

It is an amenable number.

126403345 is a deficient number, since it is larger than the sum of its proper divisors (25280675).

126403345 is an equidigital number, since it uses as much as digits as its factorization.

126403345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25280674.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 126403345 is about 11242.9242192590. The cubic root of 126403345 is about 501.8641677860.

Adding to 126403345 its reverse (543304621), we get a palindrome (669707966).

The spelling of 126403345 in words is "one hundred twenty-six million, four hundred three thousand, three hundred forty-five".