4290891 has 8 divisors (see below), whose sum is σ = 6241344. Its totient is φ = 2600520.

The previous prime is 4290889. The next prime is 4290899. The reversal of 4290891 is 1980924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4290891 - 2¹ = 4290889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 130027 = 4290891 / (4 + 2 + 9 + 0 + 8 + 9 + 1).

It is not an unprimeable number, because it can be changed into a prime (4290899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64981 + ... + 65046.

It is an arithmetic number, because the mean of its divisors is an integer number (780168).

Almost surely, 2^4290891 is an apocalyptic number.

4290891 is a deficient number, since it is larger than the sum of its proper divisors (1950453).

4290891 is a wasteful number, since it uses less digits than its factorization.

4290891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130041.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 4290891 is about 2071.4465959807. The cubic root of 4290891 is about 162.4984268092.

Adding to 4290891 its sum of digits (33), we get a palindrome (4290924).

The spelling of 4290891 in words is "four million, two hundred ninety thousand, eight hundred ninety-one".