21201458 has 8 divisors (see below), whose sum is σ = 32828160. Its totient is φ = 10258740.

The previous prime is 21201449. The next prime is 21201461. The reversal of 21201458 is 85410212.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170918 + ... + 171041.

It is an arithmetic number, because the mean of its divisors is an integer number (4103520).

Almost surely, 2^21201458 is an apocalyptic number.

21201458 is a deficient number, since it is larger than the sum of its proper divisors (11626702).

21201458 is a wasteful number, since it uses less digits than its factorization.

21201458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341992.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 21201458 is about 4604.5040992489. The cubic root of 21201458 is about 276.7718453020.

The spelling of 21201458 in words is "twenty-one million, two hundred one thousand, four hundred fifty-eight".