4291661 has 4 divisors (see below), whose sum is σ = 4681824. Its totient is φ = 3901500.

The previous prime is 4291649. The next prime is 4291673. The reversal of 4291661 is 1661924.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (4291649) and next prime (4291673).

It is a cyclic number.

It is not a de Polignac number, because 4291661 - 2¹⁸ = 4029517 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 (4291621) 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 3 ways as a sum of consecutive naturals, for example, 195065 + ... + 195086.

It is an arithmetic number, because the mean of its divisors is an integer number (1170456).

Almost surely, 2^4291661 is an apocalyptic number.

It is an amenable number.

4291661 is a deficient number, since it is larger than the sum of its proper divisors (390163).

4291661 is a wasteful number, since it uses less digits than its factorization.

4291661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390162.

The product of its digits is 2592, while the sum is 29.

The square root of 4291661 is about 2071.6324480950. The cubic root of 4291661 is about 162.5081463372.

The spelling of 4291661 in words is "four million, two hundred ninety-one thousand, six hundred sixty-one".