126921203 has 4 divisors (see below), whose sum is σ = 127630440. Its totient is φ = 126211968.

The previous prime is 126921173. The next prime is 126921217. The reversal of 126921203 is 302129621.

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 126921203 - 2⁸ = 126920947 is a prime.

It is a super-2 number, since 2×126921203² = 32217983541934418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126921283) 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, 354350 + ... + 354707.

It is an arithmetic number, because the mean of its divisors is an integer number (31907610).

Almost surely, 2^126921203 is an apocalyptic number.

126921203 is a deficient number, since it is larger than the sum of its proper divisors (709237).

126921203 is an equidigital number, since it uses as much as digits as its factorization.

126921203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709236.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 126921203 is about 11265.9310755925. The cubic root of 126921203 is about 502.5485912930.

The spelling of 126921203 in words is "one hundred twenty-six million, nine hundred twenty-one thousand, two hundred three".