4067491 has 4 divisors (see below), whose sum is σ = 4077000. Its totient is φ = 4057984.

The previous prime is 4067489. The next prime is 4067509. The reversal of 4067491 is 1947604.

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

It is a cyclic number.

It is not a de Polignac number, because 4067491 - 2¹ = 4067489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4067411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4081 + ... + 4978.

It is an arithmetic number, because the mean of its divisors is an integer number (1019250).

Almost surely, 2^4067491 is an apocalyptic number.

4067491 is a deficient number, since it is larger than the sum of its proper divisors (9509).

4067491 is an equidigital number, since it uses as much as digits as its factorization.

4067491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9508.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 4067491 is about 2016.8021717561. The cubic root of 4067491 is about 159.6279244820.

The spelling of 4067491 in words is "four million, sixty-seven thousand, four hundred ninety-one".