21141712 has 10 divisors (see below), whose sum is σ = 40962098. Its totient is φ = 10570848.

The previous prime is 21141707. The next prime is 21141713. The reversal of 21141712 is 21714112.

It can be written as a sum of positive squares in only one way, i.e., 21123216 + 18496 = 4596^2 + 136^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21141712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21141713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660663 + ... + 660694.

Almost surely, 2^21141712 is an apocalyptic number.

It is an amenable number.

21141712 is a deficient number, since it is larger than the sum of its proper divisors (19820386).

21141712 is a wasteful number, since it uses less digits than its factorization.

21141712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1321365 (or 1321359 counting only the distinct ones).

The product of its digits is 112, while the sum is 19.

The square root of 21141712 is about 4598.0117442216. The cubic root of 21141712 is about 276.5116184199.

Adding to 21141712 its reverse (21714112), we get a palindrome (42855824).

The spelling of 21141712 in words is "twenty-one million, one hundred forty-one thousand, seven hundred twelve".