21452097 has 16 divisors (see below), whose sum is σ = 29268288. Its totient is φ = 13972800.

The previous prime is 21452087. The next prime is 21452111. The reversal of 21452097 is 79025412.

It is not a de Polignac number, because 21452097 - 2¹⁵ = 21419329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21452027) 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 15 ways as a sum of consecutive naturals, for example, 24723 + ... + 25575.

It is an arithmetic number, because the mean of its divisors is an integer number (1829268).

Almost surely, 2^21452097 is an apocalyptic number.

It is an amenable number.

21452097 is a deficient number, since it is larger than the sum of its proper divisors (7816191).

21452097 is a wasteful number, since it uses less digits than its factorization.

21452097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 21452097 is about 4631.6408539523. The cubic root of 21452097 is about 277.8582209270.

The spelling of 21452097 in words is "twenty-one million, four hundred fifty-two thousand, ninety-seven".