2646861 has 8 divisors (see below), whose sum is σ = 4033344. Its totient is φ = 1512480.

The previous prime is 2646841. The next prime is 2646881. The reversal of 2646861 is 1686462.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2646841) and next prime (2646881).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2646861 - 2⁶ = 2646797 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2646841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63000 + ... + 63041.

It is an arithmetic number, because the mean of its divisors is an integer number (504168).

2^2646861 is an apocalyptic number.

2646861 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2646861 is a deficient number, since it is larger than the sum of its proper divisors (1386483).

2646861 is a wasteful number, since it uses less digits than its factorization.

2646861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126051.

The product of its digits is 13824, while the sum is 33.

The square root of 2646861 is about 1626.9176377432. The cubic root of 2646861 is about 138.3280893482.

The spelling of 2646861 in words is "two million, six hundred forty-six thousand, eight hundred sixty-one".