21295441 has 8 divisors (see below), whose sum is σ = 23098824. Its totient is φ = 19553280.

The previous prime is 21295411. The next prime is 21295459. The reversal of 21295441 is 14459212.

It can be written as a sum of positive squares in 4 ways, for example, as 172225 + 21123216 = 415^2 + 4596^2 .

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 21295441 - 2¹³ = 21287249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21295411) by changing a digit.

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, 14580 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (2887353).

Almost surely, 2^21295441 is an apocalyptic number.

It is an amenable number.

21295441 is a deficient number, since it is larger than the sum of its proper divisors (1803383).

21295441 is a wasteful number, since it uses less digits than its factorization.

21295441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30611.

The product of its digits is 2880, while the sum is 28.

The square root of 21295441 is about 4614.6983650072. The cubic root of 21295441 is about 277.1802056944.

It can be divided in two parts, 21295 and 441, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 21295441 in words is "twenty-one million, two hundred ninety-five thousand, four hundred forty-one".