21741126 has 64 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 6168960.

The previous prime is 21741121. The next prime is 21741127. The reversal of 21741126 is 62114712.

It is a junction number, because it is equal to n+sod(n) for n = 21741096 and 21741105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21741121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70665 + ... + 70971.

It is an arithmetic number, because the mean of its divisors is an integer number (790020).

Almost surely, 2^21741126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21741126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25280640).

21741126 is an abundant number, since it is smaller than the sum of its proper divisors (28820154).

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

21741126 is a wasteful number, since it uses less digits than its factorization.

21741126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389.

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

The square root of 21741126 is about 4662.7380368191. The cubic root of 21741126 is about 279.1005405816.

Adding to 21741126 its reverse (62114712), we get a palindrome (83855838).

It can be divided in two parts, 21 and 741126, that added together give a palindrome (741147).

The spelling of 21741126 in words is "twenty-one million, seven hundred forty-one thousand, one hundred twenty-six".