21035254 has 8 divisors (see below), whose sum is σ = 31783608. Its totient is φ = 10440720.

The previous prime is 21035249. The next prime is 21035269. The reversal of 21035254 is 45253012.

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 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, 38112 + ... + 38659.

It is an arithmetic number, because the mean of its divisors is an integer number (3972951).

Almost surely, 2^21035254 is an apocalyptic number.

21035254 is a deficient number, since it is larger than the sum of its proper divisors (10748354).

21035254 is a wasteful number, since it uses less digits than its factorization.

21035254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76910.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 21035254 is about 4586.4206087100. The cubic root of 21035254 is about 276.0467172197.

Adding to 21035254 its reverse (45253012), we get a palindrome (66288266).

The spelling of 21035254 in words is "twenty-one million, thirty-five thousand, two hundred fifty-four".