521057001 has 8 divisors (see below), whose sum is σ = 704528064. Its totient is φ = 342478640.

The previous prime is 521056999. The next prime is 521057003. The reversal of 521057001 is 100750125.

It is an interprime number because it is at equal distance from previous prime (521056999) and next prime (521057003).

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 521057001 - 2¹ = 521056999 is a prime.

It is a super-2 number, since 2×521057001² = 543000796582228002, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521057003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1222926 + ... + 1223351.

It is an arithmetic number, because the mean of its divisors is an integer number (88066008).

Almost surely, 2^521057001 is an apocalyptic number.

It is an amenable number.

521057001 is a deficient number, since it is larger than the sum of its proper divisors (183471063).

521057001 is a wasteful number, since it uses less digits than its factorization.

521057001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446351.

The product of its (nonzero) digits is 350, while the sum is 21.

The square root of 521057001 is about 22826.6730164516. The cubic root of 521057001 is about 804.6896433595.

The spelling of 521057001 in words is "five hundred twenty-one million, fifty-seven thousand, one".