65240142 has 32 divisors (see below), whose sum is σ = 143766144. Its totient is φ = 19572000.

The previous prime is 65240137. The next prime is 65240177. The reversal of 65240142 is 24104256.

It is a super-2 number, since 2×65240142² = 8512552256360328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1773 + ... + 11559.

It is an arithmetic number, because the mean of its divisors is an integer number (4492692).

Almost surely, 2^65240142 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65240142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71883072).

65240142 is an abundant number, since it is smaller than the sum of its proper divisors (78526002).

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

65240142 is a wasteful number, since it uses less digits than its factorization.

65240142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9904.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 65240142 is about 8077.1369927716. The cubic root of 65240142 is about 402.5671186760.

Adding to 65240142 its reverse (24104256), we get a palindrome (89344398).

The spelling of 65240142 in words is "sixty-five million, two hundred forty thousand, one hundred forty-two".