21761126 has 4 divisors (see below), whose sum is σ = 32641692. Its totient is φ = 10880562.

The previous prime is 21761093. The next prime is 21761153. The reversal of 21761126 is 62116712.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21761095 and 21761104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5440280 + ... + 5440283.

It is an arithmetic number, because the mean of its divisors is an integer number (8160423).

Almost surely, 2^21761126 is an apocalyptic number.

21761126 is a deficient number, since it is larger than the sum of its proper divisors (10880566).

21761126 is a wasteful number, since it uses less digits than its factorization.

21761126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10880565.

The product of its digits is 1008, while the sum is 26.

The square root of 21761126 is about 4664.8822064442. The cubic root of 21761126 is about 279.1860973283.

Adding to 21761126 its reverse (62116712), we get a palindrome (83877838).

The spelling of 21761126 in words is "twenty-one million, seven hundred sixty-one thousand, one hundred twenty-six".