65009142 has 60 divisors (see below), whose sum is σ = 159747588. Its totient is φ = 19596600.

The previous prime is 65009137. The next prime is 65009159. The reversal of 65009142 is 24190056.

65009142 is a `hidden beast` number, since 650 + 0 + 9 + 1 + 4 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 340267 + ... + 340457.

Almost surely, 2^65009142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65009142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79873794).

65009142 is an abundant number, since it is smaller than the sum of its proper divisors (94738446).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65009142 is a wasteful number, since it uses less digits than its factorization.

65009142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 65009142 is about 8062.8246911365. The cubic root of 65009142 is about 402.0914249624.

Adding to 65009142 its reverse (24190056), we get a palindrome (89199198).

The spelling of 65009142 in words is "sixty-five million, nine thousand, one hundred forty-two".