21701469 has 8 divisors (see below), whose sum is σ = 30637440. Its totient is φ = 13616576.

The previous prime is 21701467. The next prime is 21701473. The reversal of 21701469 is 96410712.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21701469 - 2¹ = 21701467 is a prime.

It is a super-2 number, since 2×21701469² = 941907513515922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701461) 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 7 ways as a sum of consecutive naturals, for example, 212709 + ... + 212810.

It is an arithmetic number, because the mean of its divisors is an integer number (3829680).

Almost surely, 2^21701469 is an apocalyptic number.

It is an amenable number.

21701469 is a deficient number, since it is larger than the sum of its proper divisors (8935971).

21701469 is a wasteful number, since it uses less digits than its factorization.

21701469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425539.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 21701469 is about 4658.4835515434. The cubic root of 21701469 is about 278.9307390929.

The spelling of 21701469 in words is "twenty-one million, seven hundred one thousand, four hundred sixty-nine".