64142851 has 4 divisors (see below), whose sum is σ = 64160992. Its totient is φ = 64124712.

The previous prime is 64142849. The next prime is 64142857. The reversal of 64142851 is 15824146.

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 64142851 - 2¹ = 64142849 is a prime.

It is a super-2 number, since 2×64142851² = 8228610668816402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64142857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851 + ... + 11476.

It is an arithmetic number, because the mean of its divisors is an integer number (16040248).

Almost surely, 2^64142851 is an apocalyptic number.

64142851 is a deficient number, since it is larger than the sum of its proper divisors (18141).

64142851 is a wasteful number, since it uses less digits than its factorization.

64142851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18140.

The product of its digits is 7680, while the sum is 31.

The square root of 64142851 is about 8008.9232110191. The cubic root of 64142851 is about 400.2973851005.

Adding to 64142851 its reverse (15824146), we get a palindrome (79966997).

The spelling of 64142851 in words is "sixty-four million, one hundred forty-two thousand, eight hundred fifty-one".