521096042 has 4 divisors (see below), whose sum is σ = 781644066. Its totient is φ = 260548020.

The previous prime is 521096021. The next prime is 521096047. The reversal of 521096042 is 240690125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 504047401 + 17048641 = 22451^2 + 4129^2 .

It is a junction number, because it is equal to n+sod(n) for n = 521095996 and 521096014.

It is not an unprimeable number, because it can be changed into a prime (521096047) 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 as a sum of consecutive naturals, namely, 130274009 + ... + 130274012.

Almost surely, 2^521096042 is an apocalyptic number.

521096042 is a deficient number, since it is larger than the sum of its proper divisors (260548024).

521096042 is a wasteful number, since it uses less digits than its factorization.

521096042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260548023.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 521096042 is about 22827.5281622869. The cubic root of 521096042 is about 804.7097403954.

The spelling of 521096042 in words is "five hundred twenty-one million, ninety-six thousand, forty-two".