259286642 has 4 divisors (see below), whose sum is σ = 388929966. Its totient is φ = 129643320.

The previous prime is 259286641. The next prime is 259286647. The reversal of 259286642 is 246682952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 240529081 + 18757561 = 15509^2 + 4331^2 .

It is a junction number, because it is equal to n+sod(n) for n = 259286593 and 259286602.

It is not an unprimeable number, because it can be changed into a prime (259286641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64821659 + ... + 64821662.

Almost surely, 2^259286642 is an apocalyptic number.

259286642 is a deficient number, since it is larger than the sum of its proper divisors (129643324).

259286642 is a wasteful number, since it uses less digits than its factorization.

259286642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129643323.

The product of its digits is 414720, while the sum is 44.

The square root of 259286642 is about 16102.3800104208. The cubic root of 259286642 is about 637.6661759285. Note that the first 3 decimals are identical.

The spelling of 259286642 in words is "two hundred fifty-nine million, two hundred eighty-six thousand, six hundred forty-two".