21246126 has 16 divisors (see below), whose sum is σ = 46355328. Its totient is φ = 6438200.

The previous prime is 21246101. The next prime is 21246131. The reversal of 21246126 is 62164212.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21246096 and 21246105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160890 + ... + 161021.

It is an arithmetic number, because the mean of its divisors is an integer number (2897208).

Almost surely, 2^21246126 is an apocalyptic number.

21246126 is an abundant number, since it is smaller than the sum of its proper divisors (25109202).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21246126 is a wasteful number, since it uses less digits than its factorization.

21246126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321927.

The product of its digits is 1152, while the sum is 24.

The square root of 21246126 is about 4609.3520151969. The cubic root of 21246126 is about 276.9660799433.

The spelling of 21246126 in words is "twenty-one million, two hundred forty-six thousand, one hundred twenty-six".