2631861 has 12 divisors (see below), whose sum is σ = 4001920. Its totient is φ = 1662120.

The previous prime is 2631851. The next prime is 2631887. The reversal of 2631861 is 1681362.

It is not a de Polignac number, because 2631861 - 2¹¹ = 2629813 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 (2631851) 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, 7525 + ... + 7866.

2^2631861 is an apocalyptic number.

It is an amenable number.

2631861 is a deficient number, since it is larger than the sum of its proper divisors (1370059).

2631861 is a wasteful number, since it uses less digits than its factorization.

2631861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15416 (or 15413 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2631861 is about 1622.3011434379. The cubic root of 2631861 is about 138.0662882542.

The spelling of 2631861 in words is "two million, six hundred thirty-one thousand, eight hundred sixty-one".