21341277 has 12 divisors (see below), whose sum is σ = 31332444. Its totient is φ = 13993920.

The previous prime is 21341249. The next prime is 21341317. The reversal of 21341277 is 77214312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11737476 + 9603801 = 3426^2 + 3099^2 .

It is not a de Polignac number, because 21341277 - 2¹² = 21337181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21341277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21341077) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18888 + ... + 19985.

It is an arithmetic number, because the mean of its divisors is an integer number (2611037).

Almost surely, 2^21341277 is an apocalyptic number.

It is an amenable number.

21341277 is a deficient number, since it is larger than the sum of its proper divisors (9991167).

21341277 is a wasteful number, since it uses less digits than its factorization.

21341277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38940 (or 38937 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 21341277 is about 4619.6620006230. The cubic root of 21341277 is about 277.3789294112.

Adding to 21341277 its reverse (77214312), we get a palindrome (98555589).

The spelling of 21341277 in words is "twenty-one million, three hundred forty-one thousand, two hundred seventy-seven".