21422041 has 8 divisors (see below), whose sum is σ = 22282304. Its totient is φ = 20578320.

The previous prime is 21422029. The next prime is 21422053. The reversal of 21422041 is 14022412.

It is an interprime number because it is at equal distance from previous prime (21422029) and next prime (21422053).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21422041 - 2⁷ = 21421913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21422021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1461 + ... + 6706.

It is an arithmetic number, because the mean of its divisors is an integer number (2785288).

Almost surely, 2^21422041 is an apocalyptic number.

It is an amenable number.

21422041 is a deficient number, since it is larger than the sum of its proper divisors (860263).

21422041 is an equidigital number, since it uses as much as digits as its factorization.

21422041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8271.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 21422041 is about 4628.3950782102. The cubic root of 21422041 is about 277.7283935260.

Adding to 21422041 its reverse (14022412), we get a palindrome (35444453).

The spelling of 21422041 in words is "twenty-one million, four hundred twenty-two thousand, forty-one".