64569142 has 16 divisors (see below), whose sum is σ = 110253312. Its totient is φ = 28073320.

The previous prime is 64569139. The next prime is 64569143. The reversal of 64569142 is 24196546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64569143) 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 7 ways as a sum of consecutive naturals, for example, 63298 + ... + 64309.

It is an arithmetic number, because the mean of its divisors is an integer number (6890832).

Almost surely, 2^64569142 is an apocalyptic number.

64569142 is a deficient number, since it is larger than the sum of its proper divisors (45684170).

64569142 is a wasteful number, since it uses less digits than its factorization.

64569142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127643.

The product of its digits is 51840, while the sum is 37.

The square root of 64569142 is about 8035.4926420226. The cubic root of 64569142 is about 401.1822149771.

The spelling of 64569142 in words is "sixty-four million, five hundred sixty-nine thousand, one hundred forty-two".