201241521 has 24 divisors (see below), whose sum is σ = 329521920. Its totient is φ = 117321696.

The previous prime is 201241517. The next prime is 201241541. The reversal of 201241521 is 125142102.

201241521 is a `hidden beast` number, since 20 + 124 + 1 + 521 = 666.

It is not a de Polignac number, because 201241521 - 2² = 201241517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201241494 and 201241503.

It is not an unprimeable number, because it can be changed into a prime (201241511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43041 + ... + 47486.

It is an arithmetic number, because the mean of its divisors is an integer number (13730080).

Almost surely, 2^201241521 is an apocalyptic number.

It is an amenable number.

201241521 is a deficient number, since it is larger than the sum of its proper divisors (128280399).

201241521 is a wasteful number, since it uses less digits than its factorization.

201241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90565 (or 90562 counting only the distinct ones).

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

The square root of 201241521 is about 14185.9621104809. The cubic root of 201241521 is about 586.0111288253.

Adding to 201241521 its reverse (125142102), we get a palindrome (326383623).

The spelling of 201241521 in words is "two hundred one million, two hundred forty-one thousand, five hundred twenty-one".