521246641 has 8 divisors (see below), whose sum is σ = 527106944. Its totient is φ = 515401920.

The previous prime is 521246623. The next prime is 521246683. The reversal of 521246641 is 146642125.

It is a happy number.

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 521246641 - 2²¹ = 519149489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521246441) 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, 71401 + ... + 78361.

It is an arithmetic number, because the mean of its divisors is an integer number (65888368).

Almost surely, 2^521246641 is an apocalyptic number.

It is an amenable number.

521246641 is a deficient number, since it is larger than the sum of its proper divisors (5860303).

521246641 is a wasteful number, since it uses less digits than its factorization.

521246641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7791.

The product of its digits is 11520, while the sum is 31.

The square root of 521246641 is about 22830.8265509596. The cubic root of 521246641 is about 804.7872544553.

Adding to 521246641 its reverse (146642125), we get a palindrome (667888766).

The spelling of 521246641 in words is "five hundred twenty-one million, two hundred forty-six thousand, six hundred forty-one".