287042261 has 16 divisors (see below), whose sum is σ = 326842560. Its totient is φ = 249688320.

The previous prime is 287042233. The next prime is 287042269. The reversal of 287042261 is 162240782.

It is a cyclic number.

It is not a de Polignac number, because 287042261 - 2²⁶ = 219933397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287042269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32066 + ... + 40028.

It is an arithmetic number, because the mean of its divisors is an integer number (20427660).

Almost surely, 2^287042261 is an apocalyptic number.

It is an amenable number.

287042261 is a deficient number, since it is larger than the sum of its proper divisors (39800299).

287042261 is a wasteful number, since it uses less digits than its factorization.

287042261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8116.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 287042261 is about 16942.3215941618. The cubic root of 287042261 is about 659.6526033722.

The spelling of 287042261 in words is "two hundred eighty-seven million, forty-two thousand, two hundred sixty-one".