642510452 has 12 divisors (see below), whose sum is σ = 1126835556. Its totient is φ = 320557440.

The previous prime is 642510391. The next prime is 642510481. The reversal of 642510452 is 254015246.

It can be written as a sum of positive squares in 2 ways, for example, as 186431716 + 456078736 = 13654^2 + 21356^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 172373 + ... + 176060.

It is an arithmetic number, because the mean of its divisors is an integer number (93902963).

Almost surely, 2^642510452 is an apocalyptic number.

It is an amenable number.

642510452 is a deficient number, since it is larger than the sum of its proper divisors (484325104).

642510452 is a wasteful number, since it uses less digits than its factorization.

642510452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348898 (or 348896 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 642510452 is about 25347.7898839327. The cubic root of 642510452 is about 862.8991985857.

Adding to 642510452 its reverse (254015246), we get a palindrome (896525698).

The spelling of 642510452 in words is "six hundred forty-two million, five hundred ten thousand, four hundred fifty-two".