64512142 has 4 divisors (see below), whose sum is σ = 96768216. Its totient is φ = 32256070.

The previous prime is 64512121. The next prime is 64512143. The reversal of 64512142 is 24121546.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64512143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16128034 + ... + 16128037.

It is an arithmetic number, because the mean of its divisors is an integer number (24192054).

Almost surely, 2^64512142 is an apocalyptic number.

64512142 is a deficient number, since it is larger than the sum of its proper divisors (32256074).

64512142 is a wasteful number, since it uses less digits than its factorization.

64512142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32256073.

The product of its digits is 1920, while the sum is 25.

The square root of 64512142 is about 8031.9450944339. The cubic root of 64512142 is about 401.0641290630.

Adding to 64512142 its reverse (24121546), we get a palindrome (88633688).

The spelling of 64512142 in words is "sixty-four million, five hundred twelve thousand, one hundred forty-two".