21461148 has 18 divisors (see below), whose sum is σ = 54249104. Its totient is φ = 7153704.

The previous prime is 21461137. The next prime is 21461173. The reversal of 21461148 is 84116412.

It is a happy number.

21461148 is a `hidden beast` number, since 2 + 1 + 4 + 611 + 48 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a plaindrome in base 16.

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 5 ways as a sum of consecutive naturals, for example, 298036 + ... + 298107.

Almost surely, 2^21461148 is an apocalyptic number.

It is an amenable number.

21461148 is an abundant number, since it is smaller than the sum of its proper divisors (32787956).

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

21461148 is a wasteful number, since it uses less digits than its factorization.

21461148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596153 (or 596148 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 21461148 is about 4632.6178344431. The cubic root of 21461148 is about 277.8972931157.

It can be divided in two parts, 21461 and 148, that added together give a square (21609 = 147²).

The spelling of 21461148 in words is "twenty-one million, four hundred sixty-one thousand, one hundred forty-eight".