126405703 has 4 divisors (see below), whose sum is σ = 126736128. Its totient is φ = 126075280.

The previous prime is 126405691. The next prime is 126405749. The reversal of 126405703 is 307504621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 307504621 = 71 ⋅4331051.

It is a cyclic number.

It is not a de Polignac number, because 126405703 - 2²¹ = 124308551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126405793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164638 + ... + 165403.

It is an arithmetic number, because the mean of its divisors is an integer number (31684032).

Almost surely, 2^126405703 is an apocalyptic number.

126405703 is a deficient number, since it is larger than the sum of its proper divisors (330425).

126405703 is an equidigital number, since it uses as much as digits as its factorization.

126405703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330424.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 126405703 is about 11243.0290847262. The cubic root of 126405703 is about 501.8672884533.

The spelling of 126405703 in words is "one hundred twenty-six million, four hundred five thousand, seven hundred three".