521026142 has 32 divisors (see below), whose sum is σ = 963228672. Its totient is φ = 205834464.

The previous prime is 521026127. The next prime is 521026147. The reversal of 521026142 is 241620125.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521026147) 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 in 15 ways as a sum of consecutive naturals, for example, 170843 + ... + 173865.

It is an arithmetic number, because the mean of its divisors is an integer number (30100896).

Almost surely, 2^521026142 is an apocalyptic number.

521026142 is a deficient number, since it is larger than the sum of its proper divisors (442202530).

521026142 is a wasteful number, since it uses less digits than its factorization.

521026142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3992.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 521026142 is about 22825.9970647505. The cubic root of 521026142 is about 804.6737574405.

Adding to 521026142 its reverse (241620125), we get a palindrome (762646267).

The spelling of 521026142 in words is "five hundred twenty-one million, twenty-six thousand, one hundred forty-two".