21041412 has 48 divisors (see below), whose sum is σ = 58555392. Its totient is φ = 5749920.

The previous prime is 21041411. The next prime is 21041429. The reversal of 21041412 is 21414012.

It is a junction number, because it is equal to n+sod(n) for n = 21041391 and 21041400.

It is not an unprimeable number, because it can be changed into a prime (21041411) 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, 3514 + ... + 7377.

It is an arithmetic number, because the mean of its divisors is an integer number (1219904).

Almost surely, 2^21041412 is an apocalyptic number.

It is an amenable number.

21041412 is an abundant number, since it is smaller than the sum of its proper divisors (37513980).

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

21041412 is a wasteful number, since it uses less digits than its factorization.

21041412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10928 (or 10926 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 21041412 is about 4587.0918892039. The cubic root of 21041412 is about 276.0736518415.

Adding to 21041412 its reverse (21414012), we get a palindrome (42455424).

The spelling of 21041412 in words is "twenty-one million, forty-one thousand, four hundred twelve".