287061321 has 12 divisors (see below), whose sum is σ = 400115408. Its totient is φ = 183052584.

The previous prime is 287061319. The next prime is 287061353. The reversal of 287061321 is 123160782.

It is not a de Polignac number, because 287061321 - 2¹ = 287061319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (287061361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88855 + ... + 92028.

Almost surely, 2^287061321 is an apocalyptic number.

It is an amenable number.

287061321 is a deficient number, since it is larger than the sum of its proper divisors (113054087).

287061321 is a wasteful number, since it uses less digits than its factorization.

287061321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180932 (or 180909 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 287061321 is about 16942.8840815252. The cubic root of 287061321 is about 659.6672036617.

The spelling of 287061321 in words is "two hundred eighty-seven million, sixty-one thousand, three hundred twenty-one".