521042122 has 8 divisors (see below), whose sum is σ = 784029636. Its totient is φ = 259698912.

The previous prime is 521042089. The next prime is 521042131. The reversal of 521042122 is 221240125.

It can be written as a sum of positive squares in 2 ways, for example, as 450330841 + 70711281 = 21221^2 + 8409^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 521042122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 410283 + ... + 411550.

Almost surely, 2^521042122 is an apocalyptic number.

521042122 is a deficient number, since it is larger than the sum of its proper divisors (262987514).

521042122 is a wasteful number, since it uses less digits than its factorization.

521042122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 822152.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 521042122 is about 22826.3471015404. The cubic root of 521042122 is about 804.6819838704.

Adding to 521042122 its reverse (221240125), we get a palindrome (742282247).

The spelling of 521042122 in words is "five hundred twenty-one million, forty-two thousand, one hundred twenty-two".