4781491 has 16 divisors (see below), whose sum is σ = 5816160. Its totient is φ = 3870720.

The previous prime is 4781489. The next prime is 4781507. The reversal of 4781491 is 1941874.

It is a 12-Lehmer number, since φ(4781491) divides (4781491-1)¹².

It is a cyclic number.

It is not a de Polignac number, because 4781491 - 2¹ = 4781489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4781411) 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 15 ways as a sum of consecutive naturals, for example, 3571 + ... + 4723.

It is an arithmetic number, because the mean of its divisors is an integer number (363510).

Almost surely, 2^4781491 is an apocalyptic number.

4781491 is a deficient number, since it is larger than the sum of its proper divisors (1034669).

4781491 is a wasteful number, since it uses less digits than its factorization.

4781491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206.

The product of its digits is 8064, while the sum is 34.

The square root of 4781491 is about 2186.6620680846. The cubic root of 4781491 is about 168.4694330051.

The spelling of 4781491 in words is "four million, seven hundred eighty-one thousand, four hundred ninety-one".