642506135 has 8 divisors (see below), whose sum is σ = 777831120. Its totient is φ = 509455744.

The previous prime is 642506113. The next prime is 642506149. The reversal of 642506135 is 531605246.

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

It is a cyclic number.

It is not a de Polignac number, because 642506135 - 2¹² = 642502039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 568025 + ... + 569154.

It is an arithmetic number, because the mean of its divisors is an integer number (97228890).

Almost surely, 2^642506135 is an apocalyptic number.

642506135 is a deficient number, since it is larger than the sum of its proper divisors (135324985).

642506135 is a wasteful number, since it uses less digits than its factorization.

642506135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1137297.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 642506135 is about 25347.7047284365. The cubic root of 642506135 is about 862.8972659872.

The spelling of 642506135 in words is "six hundred forty-two million, five hundred six thousand, one hundred thirty-five".