126640003 has 4 divisors (see below), whose sum is σ = 144731440. Its totient is φ = 108548568.

The previous prime is 126639973. The next prime is 126640009. The reversal of 126640003 is 300046621.

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

It is a cyclic number.

It is not a de Polignac number, because 126640003 - 2⁵ = 126639971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126640009) 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, 9045708 + ... + 9045721.

It is an arithmetic number, because the mean of its divisors is an integer number (36182860).

Almost surely, 2^126640003 is an apocalyptic number.

126640003 is a deficient number, since it is larger than the sum of its proper divisors (18091437).

126640003 is an equidigital number, since it uses as much as digits as its factorization.

126640003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18091436.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 126640003 is about 11253.4440506007. Note that the first 3 decimals coincide. The cubic root of 126640003 is about 502.1771767098.

Adding to 126640003 its reverse (300046621), we get a palindrome (426686624).

The spelling of 126640003 in words is "one hundred twenty-six million, six hundred forty thousand, three".