126266021 has 16 divisors (see below), whose sum is σ = 159439104. Its totient is φ = 97430784.

The previous prime is 126266009. The next prime is 126266033. The reversal of 126266021 is 120662621.

It is an interprime number because it is at equal distance from previous prime (126266009) and next prime (126266033).

It is a cyclic number.

It is not a de Polignac number, because 126266021 - 2⁶ = 126265957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126265021) 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, 20330 + ... + 25803.

It is an arithmetic number, because the mean of its divisors is an integer number (9964944).

Almost surely, 2^126266021 is an apocalyptic number.

It is an amenable number.

126266021 is a deficient number, since it is larger than the sum of its proper divisors (33173083).

126266021 is a wasteful number, since it uses less digits than its factorization.

126266021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46180.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 126266021 is about 11236.8154296491. The cubic root of 126266021 is about 501.6823609742.

The spelling of 126266021 in words is "one hundred twenty-six million, two hundred sixty-six thousand, twenty-one".