21415041 has 6 divisors (see below), whose sum is σ = 30932850. Its totient is φ = 14276688.

The previous prime is 21415027. The next prime is 21415067. The reversal of 21415041 is 14051412.

It can be written as a sum of positive squares in only one way, i.e., 20930625 + 484416 = 4575^2 + 696^2 .

It is not a de Polignac number, because 21415041 - 2⁹ = 21414529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21415081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1189716 + ... + 1189733.

It is an arithmetic number, because the mean of its divisors is an integer number (5155475).

Almost surely, 2^21415041 is an apocalyptic number.

It is an amenable number.

21415041 is a deficient number, since it is larger than the sum of its proper divisors (9517809).

21415041 is a wasteful number, since it uses less digits than its factorization.

21415041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379455 (or 2379452 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 21415041 is about 4627.6388147737. The cubic root of 21415041 is about 277.6981394752.

Adding to 21415041 its reverse (14051412), we get a palindrome (35466453).

The spelling of 21415041 in words is "twenty-one million, four hundred fifteen thousand, forty-one".