4289991 has 16 divisors (see below), whose sum is σ = 6109440. Its totient is φ = 2669760.

The previous prime is 4289977. The next prime is 4290017. The reversal of 4289991 is 1999824.

It is not a de Polignac number, because 4289991 - 2⁵ = 4289959 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4289911) 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, 3646 + ... + 4676.

It is an arithmetic number, because the mean of its divisors is an integer number (381840).

Almost surely, 2^4289991 is an apocalyptic number.

4289991 is a deficient number, since it is larger than the sum of its proper divisors (1819449).

4289991 is a wasteful number, since it uses less digits than its factorization.

4289991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its digits is 46656, while the sum is 42.

The square root of 4289991 is about 2071.2293450992. The cubic root of 4289991 is about 162.4870648481.

The spelling of 4289991 in words is "four million, two hundred eighty-nine thousand, nine hundred ninety-one".