64999142 has 8 divisors (see below), whose sum is σ = 104998656. Its totient is φ = 29999592.

The previous prime is 64999141. The next prime is 64999159. The reversal of 64999142 is 24199946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 64999093 and 64999102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64999141) by changing a digit.

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, 1249958 + ... + 1250009.

It is an arithmetic number, because the mean of its divisors is an integer number (13124832).

Almost surely, 2^64999142 is an apocalyptic number.

64999142 is a deficient number, since it is larger than the sum of its proper divisors (39999514).

64999142 is a wasteful number, since it uses less digits than its factorization.

64999142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2499982.

The product of its digits is 139968, while the sum is 44.

The square root of 64999142 is about 8062.2045372218. The cubic root of 64999142 is about 402.0708067318.

The spelling of 64999142 in words is "sixty-four million, nine hundred ninety-nine thousand, one hundred forty-two".