287258042 has 4 divisors (see below), whose sum is σ = 430887066. Its totient is φ = 143629020.

The previous prime is 287258029. The next prime is 287258057. The reversal of 287258042 is 240852782.

It is a happy number.

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., 220492801 + 66765241 = 14849^2 + 8171^2 .

It is a junction number, because it is equal to n+sod(n) for n = 287257987 and 287258005.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71814509 + ... + 71814512.

Almost surely, 2^287258042 is an apocalyptic number.

287258042 is a deficient number, since it is larger than the sum of its proper divisors (143629024).

287258042 is a wasteful number, since it uses less digits than its factorization.

287258042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143629023.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 287258042 is about 16948.6885038342. The cubic root of 287258042 is about 659.8178576047.

The spelling of 287258042 in words is "two hundred eighty-seven million, two hundred fifty-eight thousand, forty-two".