2905661 has 8 divisors (see below), whose sum is σ = 3272448. Its totient is φ = 2556000.

The previous prime is 2905631. The next prime is 2905667. The reversal of 2905661 is 1665092.

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

It is a cyclic number.

It is not a de Polignac number, because 2905661 - 2¹⁴ = 2889277 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 (2905667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3920 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (409056).

2^2905661 is an apocalyptic number.

It is an amenable number.

2905661 is a deficient number, since it is larger than the sum of its proper divisors (366787).

2905661 is a wasteful number, since it uses less digits than its factorization.

2905661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8563.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2905661 is about 1704.5999530682. The cubic root of 2905661 is about 142.6970455538.

The spelling of 2905661 in words is "two million, nine hundred five thousand, six hundred sixty-one".