126471921 has 16 divisors (see below), whose sum is σ = 173261760. Its totient is φ = 82010880.

The previous prime is 126471907. The next prime is 126471931. The reversal of 126471921 is 129174621.

It is a happy number.

It is not a de Polignac number, because 126471921 - 2⁵ = 126471889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (126471931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45261 + ... + 47973.

It is an arithmetic number, because the mean of its divisors is an integer number (10828860).

Almost surely, 2^126471921 is an apocalyptic number.

It is an amenable number.

126471921 is a deficient number, since it is larger than the sum of its proper divisors (46789839).

126471921 is a wasteful number, since it uses less digits than its factorization.

126471921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3136.

The product of its digits is 6048, while the sum is 33.

The square root of 126471921 is about 11245.9735461186. The cubic root of 126471921 is about 501.9549080411.

The spelling of 126471921 in words is "one hundred twenty-six million, four hundred seventy-one thousand, nine hundred twenty-one".