2606321 has 4 divisors (see below), whose sum is σ = 2759652. Its totient is φ = 2452992.

The previous prime is 2606311. The next prime is 2606353. The reversal of 2606321 is 1236062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1236062 = 2 ⋅618031.

It can be written as a sum of positive squares in 2 ways, for example, as 929296 + 1677025 = 964^2 + 1295^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2606321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2606293 and 2606302.

It is not an unprimeable number, because it can be changed into a prime (2606311) 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, 76640 + ... + 76673.

It is an arithmetic number, because the mean of its divisors is an integer number (689913).

2^2606321 is an apocalyptic number.

It is an amenable number.

2606321 is a deficient number, since it is larger than the sum of its proper divisors (153331).

2606321 is a wasteful number, since it uses less digits than its factorization.

2606321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153330.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 2606321 is about 1614.4104186978. The cubic root of 2606321 is about 137.6182299907.

The spelling of 2606321 in words is "two million, six hundred six thousand, three hundred twenty-one".