259665142 has 32 divisors (see below), whose sum is σ = 432752544. Its totient is φ = 115872000.

The previous prime is 259665137. The next prime is 259665143. The reversal of 259665142 is 241566952.

It is a junction number, because it is equal to n+sod(n) for n = 259665095 and 259665104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (259665143) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 303988 + ... + 304840.

It is an arithmetic number, because the mean of its divisors is an integer number (13523517).

Almost surely, 2^259665142 is an apocalyptic number.

259665142 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

259665142 is a deficient number, since it is larger than the sum of its proper divisors (173087402).

259665142 is a wasteful number, since it uses less digits than its factorization.

259665142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 129600, while the sum is 40.

The square root of 259665142 is about 16114.1286453845. The cubic root of 259665142 is about 637.9763079877.

The spelling of 259665142 in words is "two hundred fifty-nine million, six hundred sixty-five thousand, one hundred forty-two".