64021142 has 4 divisors (see below), whose sum is σ = 96031716. Its totient is φ = 32010570.

The previous prime is 64021129. The next prime is 64021187. The reversal of 64021142 is 24112046.

64021142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16005284 + ... + 16005287.

It is an arithmetic number, because the mean of its divisors is an integer number (24007929).

Almost surely, 2^64021142 is an apocalyptic number.

64021142 is a deficient number, since it is larger than the sum of its proper divisors (32010574).

64021142 is a wasteful number, since it uses less digits than its factorization.

64021142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32010573.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64021142 is about 8001.3212658910. The cubic root of 64021142 is about 400.0440409841.

Adding to 64021142 its reverse (24112046), we get a palindrome (88133188).

It can be divided in two parts, 640211 and 42, that multiplied together give a palindrome (26888862).

The spelling of 64021142 in words is "sixty-four million, twenty-one thousand, one hundred forty-two".