21458122 has 8 divisors (see below), whose sum is σ = 36785376. Its totient is φ = 9196332.

The previous prime is 21458119. The next prime is 21458141. The reversal of 21458122 is 22185412.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 766348 + ... + 766375.

It is an arithmetic number, because the mean of its divisors is an integer number (4598172).

Almost surely, 2^21458122 is an apocalyptic number.

21458122 is a deficient number, since it is larger than the sum of its proper divisors (15327254).

21458122 is a wasteful number, since it uses less digits than its factorization.

21458122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532732.

The product of its digits is 1280, while the sum is 25.

The square root of 21458122 is about 4632.2912257327. The cubic root of 21458122 is about 277.8842314234.

The spelling of 21458122 in words is "twenty-one million, four hundred fifty-eight thousand, one hundred twenty-two".