21441042 has 24 divisors (see below), whose sum is σ = 53092416. Its totient is φ = 6125976.

The previous prime is 21441031. The next prime is 21441089. The reversal of 21441042 is 24014412.

21441042 is a `hidden beast` number, since 214 + 410 + 42 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84958 + ... + 85209.

It is an arithmetic number, because the mean of its divisors is an integer number (2212184).

Almost surely, 2^21441042 is an apocalyptic number.

21441042 is an abundant number, since it is smaller than the sum of its proper divisors (31651374).

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

21441042 is a wasteful number, since it uses less digits than its factorization.

21441042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170182 (or 170179 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 21441042 is about 4630.4472786114. The cubic root of 21441042 is about 277.8104827744.

Adding to 21441042 its reverse (24014412), we get a palindrome (45455454).

The spelling of 21441042 in words is "twenty-one million, four hundred forty-one thousand, forty-two".