21294041 has 4 divisors (see below), whose sum is σ = 22414800. Its totient is φ = 20173284.

The previous prime is 21294029. The next prime is 21294089. The reversal of 21294041 is 14049212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21294041 - 2⁶ = 21293977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21293998 and 21294016.

It is not an unprimeable number, because it can be changed into a prime (21294001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560351 + ... + 560388.

It is an arithmetic number, because the mean of its divisors is an integer number (5603700).

Almost surely, 2^21294041 is an apocalyptic number.

It is an amenable number.

21294041 is a deficient number, since it is larger than the sum of its proper divisors (1120759).

21294041 is a wasteful number, since it uses less digits than its factorization.

21294041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1120758.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 21294041 is about 4614.5466732931. The cubic root of 21294041 is about 277.1741314554.

The spelling of 21294041 in words is "twenty-one million, two hundred ninety-four thousand, forty-one".