4287391 has 4 divisors (see below), whose sum is σ = 4313232. Its totient is φ = 4261552.

The previous prime is 4287379. The next prime is 4287403. The reversal of 4287391 is 1937824.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (4287379) and next prime (4287403).

It is a cyclic number.

It is not a de Polignac number, because 4287391 - 2⁵ = 4287359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4287341) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 12670 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (1078308).

Almost surely, 2^4287391 is an apocalyptic number.

4287391 is a deficient number, since it is larger than the sum of its proper divisors (25841).

4287391 is a wasteful number, since it uses less digits than its factorization.

4287391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25840.

The product of its digits is 12096, while the sum is 34.

The square root of 4287391 is about 2070.6016033994. The cubic root of 4287391 is about 162.4542324758.

The spelling of 4287391 in words is "four million, two hundred eighty-seven thousand, three hundred ninety-one".