2642661 has 12 divisors (see below), whose sum is σ = 4362592. Its totient is φ = 1510056.

The previous prime is 2642639. The next prime is 2642693. The reversal of 2642661 is 1662462.

It is a happy number.

It is not a de Polignac number, because 2642661 - 2⁹ = 2642149 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 (2642621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20911 + ... + 21036.

2^2642661 is an apocalyptic number.

2642661 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2642661 is a deficient number, since it is larger than the sum of its proper divisors (1719931).

2642661 is a wasteful number, since it uses less digits than its factorization.

2642661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41960 (or 41957 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 2642661 is about 1625.6263408299. The cubic root of 2642661 is about 138.2548849572.

The spelling of 2642661 in words is "two million, six hundred forty-two thousand, six hundred sixty-one".