21141276 has 48 divisors (see below), whose sum is σ = 54147744. Its totient is φ = 6379776.

The previous prime is 21141271. The next prime is 21141299. The reversal of 21141276 is 67214112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6990 + ... + 9546.

It is an arithmetic number, because the mean of its divisors is an integer number (1128078).

Almost surely, 2^21141276 is an apocalyptic number.

21141276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21141276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27073872).

21141276 is an abundant number, since it is smaller than the sum of its proper divisors (33006468).

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

21141276 is a wasteful number, since it uses less digits than its factorization.

21141276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2630 (or 2628 counting only the distinct ones).

The product of its digits is 672, while the sum is 24.

The square root of 21141276 is about 4597.9643321801. The cubic root of 21141276 is about 276.5097175979.

Adding to 21141276 its reverse (67214112), we get a palindrome (88355388).

The spelling of 21141276 in words is "twenty-one million, one hundred forty-one thousand, two hundred seventy-six".