126416221 has 4 divisors (see below), whose sum is σ = 127939392. Its totient is φ = 124893052.

The previous prime is 126416209. The next prime is 126416231. The reversal of 126416221 is 122614621.

It is a happy number.

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 126416221 - 2⁷ = 126416093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126416231) 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, 761461 + ... + 761626.

It is an arithmetic number, because the mean of its divisors is an integer number (31984848).

Almost surely, 2^126416221 is an apocalyptic number.

It is an amenable number.

126416221 is a deficient number, since it is larger than the sum of its proper divisors (1523171).

126416221 is an equidigital number, since it uses as much as digits as its factorization.

126416221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523170.

The product of its digits is 1152, while the sum is 25.

The square root of 126416221 is about 11243.4968315022. The cubic root of 126416221 is about 501.8812079037.

The spelling of 126416221 in words is "one hundred twenty-six million, four hundred sixteen thousand, two hundred twenty-one".