521341402 has 4 divisors (see below), whose sum is σ = 782012106. Its totient is φ = 260670700.

The previous prime is 521341393. The next prime is 521341421. The reversal of 521341402 is 204143125.

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., 340734681 + 180606721 = 18459^2 + 13439^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130335349 + ... + 130335352.

Almost surely, 2^521341402 is an apocalyptic number.

521341402 is a deficient number, since it is larger than the sum of its proper divisors (260670704).

521341402 is a wasteful number, since it uses less digits than its factorization.

521341402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260670703.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 521341402 is about 22832.9017428797. The cubic root of 521341402 is about 804.8360207641.

Adding to 521341402 its reverse (204143125), we get a palindrome (725484527).

The spelling of 521341402 in words is "five hundred twenty-one million, three hundred forty-one thousand, four hundred two".