21371262 has 24 divisors (see below), whose sum is σ = 46983048. Its totient is φ = 6475920.

The previous prime is 21371239. The next prime is 21371263. The reversal of 21371262 is 26217312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21371263) 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 11 ways as a sum of consecutive naturals, for example, 13993 + ... + 15444.

It is an arithmetic number, because the mean of its divisors is an integer number (1957627).

Almost surely, 2^21371262 is an apocalyptic number.

21371262 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21371262 is an abundant number, since it is smaller than the sum of its proper divisors (25611786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21371262 is a wasteful number, since it uses less digits than its factorization.

21371262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29464 (or 29453 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 21371262 is about 4622.9062287699. The cubic root of 21371262 is about 277.5087766074.

Adding to 21371262 its reverse (26217312), we get a palindrome (47588574).

The spelling of 21371262 in words is "twenty-one million, three hundred seventy-one thousand, two hundred sixty-two".