2609641 has 8 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 2541840.

The previous prime is 2609639. The next prime is 2609657. The reversal of 2609641 is 1469062.

It is the 660-th star number.

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 2609641 - 2¹ = 2609639 is a prime.

It is a super-2 number, since 2×2609641² = 13620452297762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2609671) 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 7 ways as a sum of consecutive naturals, for example, 10800 + ... + 11038.

It is an arithmetic number, because the mean of its divisors is an integer number (334800).

2^2609641 is an apocalyptic number.

It is an amenable number.

2609641 is a deficient number, since it is larger than the sum of its proper divisors (68759).

2609641 is a wasteful number, since it uses less digits than its factorization.

2609641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 2609641 is about 1615.4383306088. The cubic root of 2609641 is about 137.6766390995.

The spelling of 2609641 in words is "two million, six hundred nine thousand, six hundred forty-one".