521028142 has 8 divisors (see below), whose sum is σ = 783356832. Its totient is φ = 259909200.

The previous prime is 521028133. The next prime is 521028149. The reversal of 521028142 is 241820125.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521028149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301359 + ... + 303082.

It is an arithmetic number, because the mean of its divisors is an integer number (97919604).

Almost surely, 2^521028142 is an apocalyptic number.

521028142 is a deficient number, since it is larger than the sum of its proper divisors (262328690).

521028142 is a wasteful number, since it uses less digits than its factorization.

521028142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604874.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 521028142 is about 22826.0408744048. The cubic root of 521028142 is about 804.6747870404.

Adding to 521028142 its reverse (241820125), we get a palindrome (762848267).

The spelling of 521028142 in words is "five hundred twenty-one million, twenty-eight thousand, one hundred forty-two".