21959241 has 8 divisors (see below), whose sum is σ = 30070464. Its totient is φ = 14243760.

The previous prime is 21959239. The next prime is 21959251. The reversal of 21959241 is 14295912.

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

It is not a de Polignac number, because 21959241 - 2¹ = 21959239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21959221) 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, 98805 + ... + 99026.

It is an arithmetic number, because the mean of its divisors is an integer number (3758808).

Almost surely, 2^21959241 is an apocalyptic number.

It is an amenable number.

21959241 is a deficient number, since it is larger than the sum of its proper divisors (8111223).

21959241 is a wasteful number, since it uses less digits than its factorization.

21959241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197871.

The product of its digits is 6480, while the sum is 33.

The square root of 21959241 is about 4686.0688215177. The cubic root of 21959241 is about 280.0307831802.

The spelling of 21959241 in words is "twenty-one million, nine hundred fifty-nine thousand, two hundred forty-one".