21246254 has 8 divisors (see below), whose sum is σ = 32409720. Its totient is φ = 10443016.

The previous prime is 21246229. The next prime is 21246263. The reversal of 21246254 is 45264212.

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

It is a congruent number.

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, 89909 + ... + 90144.

It is an arithmetic number, because the mean of its divisors is an integer number (4051215).

Almost surely, 2^21246254 is an apocalyptic number.

21246254 is a deficient number, since it is larger than the sum of its proper divisors (11163466).

21246254 is a wasteful number, since it uses less digits than its factorization.

21246254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180114.

The product of its digits is 3840, while the sum is 26.

The square root of 21246254 is about 4609.3658999910. The cubic root of 21246254 is about 276.9666361481.

The spelling of 21246254 in words is "twenty-one million, two hundred forty-six thousand, two hundred fifty-four".