259387042 has 4 divisors (see below), whose sum is σ = 389080566. Its totient is φ = 129693520.

The previous prime is 259387027. The next prime is 259387043. The reversal of 259387042 is 240783952.

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., 246144721 + 13242321 = 15689^2 + 3639^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 259386986 and 259387004.

It is not an unprimeable number, because it can be changed into a prime (259387043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64846759 + ... + 64846762.

Almost surely, 2^259387042 is an apocalyptic number.

259387042 is a deficient number, since it is larger than the sum of its proper divisors (129693524).

259387042 is a wasteful number, since it uses less digits than its factorization.

259387042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129693523.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 259387042 is about 16105.4972602525. The cubic root of 259387042 is about 637.7484702083.

The spelling of 259387042 in words is "two hundred fifty-nine million, three hundred eighty-seven thousand, forty-two".