64742135 has 4 divisors (see below), whose sum is σ = 77690568. Its totient is φ = 51793704.

The previous prime is 64742129. The next prime is 64742143. The reversal of 64742135 is 53124746.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64742135 - 2⁸ = 64741879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6474209 + ... + 6474218.

It is an arithmetic number, because the mean of its divisors is an integer number (19422642).

Almost surely, 2^64742135 is an apocalyptic number.

64742135 is a deficient number, since it is larger than the sum of its proper divisors (12948433).

64742135 is a wasteful number, since it uses less digits than its factorization.

64742135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12948432.

The product of its digits is 20160, while the sum is 32.

The square root of 64742135 is about 8046.2497475532. The cubic root of 64742135 is about 401.5401766118.

The spelling of 64742135 in words is "sixty-four million, seven hundred forty-two thousand, one hundred thirty-five".