21141279 has 6 divisors (see below), whose sum is σ = 30537416. Its totient is φ = 14094180.

The previous prime is 21141271. The next prime is 21141299. The reversal of 21141279 is 97214112.

It is not a de Polignac number, because 21141279 - 2³ = 21141271 is a prime.

It is a Duffinian number.

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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174507 + ... + 1174524.

Almost surely, 2^21141279 is an apocalyptic number.

21141279 is a deficient number, since it is larger than the sum of its proper divisors (9396137).

21141279 is a wasteful number, since it uses less digits than its factorization.

21141279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2349037 (or 2349034 counting only the distinct ones).

The product of its digits is 1008, while the sum is 27.

The square root of 21141279 is about 4597.9646584114. The cubic root of 21141279 is about 276.5097306770.

The spelling of 21141279 in words is "twenty-one million, one hundred forty-one thousand, two hundred seventy-nine".