21001298 has 8 divisors (see below), whose sum is σ = 31521792. Its totient is φ = 10494036.

The previous prime is 21001247. The next prime is 21001319. The reversal of 21001298 is 89210012.

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, 3311 + ... + 7277.

It is an arithmetic number, because the mean of its divisors is an integer number (3940224).

Almost surely, 2^21001298 is an apocalyptic number.

21001298 is a deficient number, since it is larger than the sum of its proper divisors (10520494).

21001298 is a wasteful number, since it uses less digits than its factorization.

21001298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 21001298 is about 4582.7173161783. The cubic root of 21001298 is about 275.8981017807.

The spelling of 21001298 in words is "twenty-one million, one thousand, two hundred ninety-eight".