2642261 has 4 divisors (see below), whose sum is σ = 2668524. Its totient is φ = 2616000.

The previous prime is 2642257. The next prime is 2642287. The reversal of 2642261 is 1622462.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1622462 = 2 ⋅811231.

It can be written as a sum of positive squares in 2 ways, for example, as 1739761 + 902500 = 1319^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2642261 - 2² = 2642257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2642201) 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, 12980 + ... + 13181.

It is an arithmetic number, because the mean of its divisors is an integer number (667131).

2^2642261 is an apocalyptic number.

It is an amenable number.

2642261 is a deficient number, since it is larger than the sum of its proper divisors (26263).

2642261 is a wasteful number, since it uses less digits than its factorization.

2642261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26262.

The product of its digits is 1152, while the sum is 23.

The square root of 2642261 is about 1625.5033066715. The cubic root of 2642261 is about 138.2479090663.

The spelling of 2642261 in words is "two million, six hundred forty-two thousand, two hundred sixty-one".