21701452 has 24 divisors (see below), whose sum is σ = 40373424. Its totient is φ = 10171392.

The previous prime is 21701447. The next prime is 21701453. The reversal of 21701452 is 25410712.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21701453) 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 7 ways as a sum of consecutive naturals, for example, 22443 + ... + 23389.

It is an arithmetic number, because the mean of its divisors is an integer number (1682226).

Almost surely, 2^21701452 is an apocalyptic number.

It is an amenable number.

21701452 is a deficient number, since it is larger than the sum of its proper divisors (18671972).

21701452 is a wasteful number, since it uses less digits than its factorization.

21701452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1303 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 21701452 is about 4658.4817269149. The cubic root of 21701452 is about 278.9306662587.

The spelling of 21701452 in words is "twenty-one million, seven hundred one thousand, four hundred fifty-two".