126864403 has 4 divisors (see below), whose sum is σ = 126888048. Its totient is φ = 126840760.

The previous prime is 126864391. The next prime is 126864449. The reversal of 126864403 is 304468621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 304468621 = 7547 ⋅40343.

It is a cyclic number.

It is not a de Polignac number, because 126864403 - 2¹⁷ = 126733331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126864103) 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, 525 + ... + 15937.

It is an arithmetic number, because the mean of its divisors is an integer number (31722012).

Almost surely, 2^126864403 is an apocalyptic number.

126864403 is a deficient number, since it is larger than the sum of its proper divisors (23645).

126864403 is an equidigital number, since it uses as much as digits as its factorization.

126864403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23644.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 126864403 is about 11263.4099188478. The cubic root of 126864403 is about 502.4736129639.

The spelling of 126864403 in words is "one hundred twenty-six million, eight hundred sixty-four thousand, four hundred three".