21254000 has 40 divisors (see below), whose sum is σ = 51397008. Its totient is φ = 8500800.

The previous prime is 21253993. The next prime is 21254017. The reversal of 21254000 is 45212.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3314 + ... + 7313.

Almost surely, 2^21254000 is an apocalyptic number.

21254000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21254000 is an abundant number, since it is smaller than the sum of its proper divisors (30143008).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21254000 is a wasteful number, since it uses less digits than its factorization.

21254000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10650 (or 10634 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 21254000 is about 4610.2060691470. The cubic root of 21254000 is about 277.0002910674. Note that the first 3 decimals are identical.

Adding to 21254000 its reverse (45212), we get a palindrome (21299212).

The spelling of 21254000 in words is "twenty-one million, two hundred fifty-four thousand".