21059254 has 8 divisors (see below), whose sum is σ = 31608360. Its totient is φ = 10523136.

The previous prime is 21059251. The next prime is 21059263. The reversal of 21059254 is 45295012.

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

It is a super-3 number, since 3×21059254³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21059251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4662 + ... + 7990.

It is an arithmetic number, because the mean of its divisors is an integer number (3951045).

Almost surely, 2^21059254 is an apocalyptic number.

21059254 is a deficient number, since it is larger than the sum of its proper divisors (10549106).

21059254 is a wasteful number, since it uses less digits than its factorization.

21059254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 21059254 is about 4589.0362822710. The cubic root of 21059254 is about 276.1516617283.

The spelling of 21059254 in words is "twenty-one million, fifty-nine thousand, two hundred fifty-four".