21141442 has 24 divisors (see below), whose sum is σ = 38085120. Its totient is φ = 8767080.

The previous prime is 21141437. The next prime is 21141451. The reversal of 21141442 is 24414112.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 442 + ... + 6517.

It is an arithmetic number, because the mean of its divisors is an integer number (1586880).

Almost surely, 2^21141442 is an apocalyptic number.

21141442 is a deficient number, since it is larger than the sum of its proper divisors (16943678).

21141442 is a wasteful number, since it uses less digits than its factorization.

21141442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7006 (or 6999 counting only the distinct ones).

The product of its digits is 256, while the sum is 19.

The square root of 21141442 is about 4597.9823836113. The cubic root of 21141442 is about 276.5104413084.

Adding to 21141442 its reverse (24414112), we get a palindrome (45555554).

The spelling of 21141442 in words is "twenty-one million, one hundred forty-one thousand, four hundred forty-two".