287121104 has 10 divisors (see below), whose sum is σ = 556297170. Its totient is φ = 143560544.

The previous prime is 287121061. The next prime is 287121113. The reversal of 287121104 is 401121782.

It can be written as a sum of positive squares in only one way, i.e., 231648400 + 55472704 = 15220^2 + 7448^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8972519 + ... + 8972550.

It is an arithmetic number, because the mean of its divisors is an integer number (55629717).

Almost surely, 2^287121104 is an apocalyptic number.

It is an amenable number.

287121104 is a deficient number, since it is larger than the sum of its proper divisors (269176066).

287121104 is a wasteful number, since it uses less digits than its factorization.

287121104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17945077 (or 17945071 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 287121104 is about 16944.6482406688. The cubic root of 287121104 is about 659.7129942811.

Adding to 287121104 its reverse (401121782), we get a palindrome (688242886).

The spelling of 287121104 in words is "two hundred eighty-seven million, one hundred twenty-one thousand, one hundred four".