2661535 has 4 divisors (see below), whose sum is σ = 3193848. Its totient is φ = 2129224.

The previous prime is 2661517. The next prime is 2661541. The reversal of 2661535 is 5351662.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5351662 = 2 ⋅2675831.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2661535 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 266149 + ... + 266158.

It is an arithmetic number, because the mean of its divisors is an integer number (798462).

2^2661535 is an apocalyptic number.

2661535 is a deficient number, since it is larger than the sum of its proper divisors (532313).

2661535 is an equidigital number, since it uses as much as digits as its factorization.

2661535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532312.

The product of its digits is 5400, while the sum is 28.

The square root of 2661535 is about 1631.4211596029. The cubic root of 2661535 is about 138.5832452763.

The spelling of 2661535 in words is "two million, six hundred sixty-one thousand, five hundred thirty-five".