287425258 has 4 divisors (see below), whose sum is σ = 431137890. Its totient is φ = 143712628.

The previous prime is 287425247. The next prime is 287425277. The reversal of 287425258 is 852524782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 852524782 = 2 ⋅426262391.

It can be written as a sum of positive squares in only one way, i.e., 199572129 + 87853129 = 14127^2 + 9373^2 .

It is a super-3 number, since 3×287425258³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71856313 + ... + 71856316.

Almost surely, 2^287425258 is an apocalyptic number.

287425258 is a deficient number, since it is larger than the sum of its proper divisors (143712632).

287425258 is a wasteful number, since it uses less digits than its factorization.

287425258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143712631.

The product of its digits is 358400, while the sum is 43.

The square root of 287425258 is about 16953.6207932111. The cubic root of 287425258 is about 659.9458617974.

The spelling of 287425258 in words is "two hundred eighty-seven million, four hundred twenty-five thousand, two hundred fifty-eight".