521042417 has 8 divisors (see below), whose sum is σ = 606712896. Its totient is φ = 438180912.

The previous prime is 521042383. The next prime is 521042441. The reversal of 521042417 is 714240125.

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 521042417 - 2¹⁶ = 520976881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521012417) 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, 701843 + ... + 702584.

It is an arithmetic number, because the mean of its divisors is an integer number (75839112).

Almost surely, 2^521042417 is an apocalyptic number.

It is an amenable number.

521042417 is a deficient number, since it is larger than the sum of its proper divisors (85670479).

521042417 is a wasteful number, since it uses less digits than its factorization.

521042417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1404487.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 521042417 is about 22826.3535633706. The cubic root of 521042417 is about 804.6821357335.

The spelling of 521042417 in words is "five hundred twenty-one million, forty-two thousand, four hundred seventeen".