126166421 has 8 divisors (see below), whose sum is σ = 127526784. Its totient is φ = 124810560.

The previous prime is 126166399. The next prime is 126166423. The reversal of 126166421 is 124661621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-126166421 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 (126166423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101876 + ... + 103106.

It is an arithmetic number, because the mean of its divisors is an integer number (15940848).

Almost surely, 2^126166421 is an apocalyptic number.

It is an amenable number.

126166421 is a deficient number, since it is larger than the sum of its proper divisors (1360363).

126166421 is a wasteful number, since it uses less digits than its factorization.

126166421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251.

The product of its digits is 3456, while the sum is 29.

The square root of 126166421 is about 11232.3826946913. The cubic root of 126166421 is about 501.5504154547.

The spelling of 126166421 in words is "one hundred twenty-six million, one hundred sixty-six thousand, four hundred twenty-one".