21141255 has 32 divisors (see below), whose sum is σ = 35582976. Its totient is φ = 10697984.

The previous prime is 21141233. The next prime is 21141257. The reversal of 21141255 is 55214112.

It is a cyclic number.

It is not a de Polignac number, because 21141255 - 2¹¹ = 21139207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141257) 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 31 ways as a sum of consecutive naturals, for example, 80254 + ... + 80516.

It is an arithmetic number, because the mean of its divisors is an integer number (1111968).

Almost surely, 2^21141255 is an apocalyptic number.

21141255 is a deficient number, since it is larger than the sum of its proper divisors (14441721).

21141255 is a wasteful number, since it uses less digits than its factorization.

21141255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527.

The product of its digits is 400, while the sum is 21.

The square root of 21141255 is about 4597.9620485602. The cubic root of 21141255 is about 276.5096260439.

Adding to 21141255 its reverse (55214112), we get a palindrome (76355367).

The spelling of 21141255 in words is "twenty-one million, one hundred forty-one thousand, two hundred fifty-five".