21410254 has 4 divisors (see below), whose sum is σ = 32115384. Its totient is φ = 10705126.

The previous prime is 21410237. The next prime is 21410261. The reversal of 21410254 is 45201412.

It is a semiprime because it is the product of two 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 as a sum of consecutive naturals, namely, 5352562 + ... + 5352565.

It is an arithmetic number, because the mean of its divisors is an integer number (8028846).

Almost surely, 2^21410254 is an apocalyptic number.

21410254 is a deficient number, since it is larger than the sum of its proper divisors (10705130).

21410254 is a wasteful number, since it uses less digits than its factorization.

21410254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10705129.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 21410254 is about 4627.1215674542. The cubic root of 21410254 is about 277.6774462304.

Adding to 21410254 its reverse (45201412), we get a palindrome (66611666).

The spelling of 21410254 in words is "twenty-one million, four hundred ten thousand, two hundred fifty-four".