126008921 has 4 divisors (see below), whose sum is σ = 126915600. Its totient is φ = 125102244.

The previous prime is 126008903. The next prime is 126008923. The reversal of 126008921 is 129800621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126008921 - 2¹⁰ = 126007897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126008923) 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, 453131 + ... + 453408.

It is an arithmetic number, because the mean of its divisors is an integer number (31728900).

Almost surely, 2^126008921 is an apocalyptic number.

It is an amenable number.

126008921 is a deficient number, since it is larger than the sum of its proper divisors (906679).

126008921 is an equidigital number, since it uses as much as digits as its factorization.

126008921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906678.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 126008921 is about 11225.3695262116. The cubic root of 126008921 is about 501.3416248656.

The spelling of 126008921 in words is "one hundred twenty-six million, eight thousand, nine hundred twenty-one".