521249259 has 8 divisors (see below), whose sum is σ = 697564672. Its totient is φ = 346216680.

The previous prime is 521249203. The next prime is 521249279. The reversal of 521249259 is 952942125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521249259 - 2¹³ = 521241067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521249279) 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, 319759 + ... + 321384.

It is an arithmetic number, because the mean of its divisors is an integer number (87195584).

Almost surely, 2^521249259 is an apocalyptic number.

521249259 is a deficient number, since it is larger than the sum of its proper divisors (176315413).

521249259 is a wasteful number, since it uses less digits than its factorization.

521249259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641417.

The product of its digits is 64800, while the sum is 39.

The square root of 521249259 is about 22830.8838856493. The cubic root of 521249259 is about 804.7886018209.

The spelling of 521249259 in words is "five hundred twenty-one million, two hundred forty-nine thousand, two hundred fifty-nine".