21410128 has 20 divisors (see below), whose sum is σ = 41716948. Its totient is φ = 10644480.

The previous prime is 21410117. The next prime is 21410141. The reversal of 21410128 is 82101412.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1411344 + 19998784 = 1188^2 + 4472^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 801 + ... + 6592.

Almost surely, 2^21410128 is an apocalyptic number.

It is an amenable number.

21410128 is a deficient number, since it is larger than the sum of its proper divisors (20306820).

21410128 is a wasteful number, since it uses less digits than its factorization.

21410128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7582 (or 7576 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 21410128 is about 4627.1079520582. The cubic root of 21410128 is about 277.6769015159.

The spelling of 21410128 in words is "twenty-one million, four hundred ten thousand, one hundred twenty-eight".