2629861 has 8 divisors (see below), whose sum is σ = 2865240. Its totient is φ = 2399232.

The previous prime is 2629859. The next prime is 2629867. The reversal of 2629861 is 1689262.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 168100 + 2461761 = 410^2 + 1569^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2629861 - 2¹ = 2629859 is a prime.

It is a Duffinian number.

2629861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2629867) 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, 21 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (358155).

2^2629861 is an apocalyptic number.

It is an amenable number.

2629861 is a deficient number, since it is larger than the sum of its proper divisors (235379).

2629861 is a wasteful number, since it uses less digits than its factorization.

2629861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375.

The product of its digits is 10368, while the sum is 34.

The square root of 2629861 is about 1621.6846179205. The cubic root of 2629861 is about 138.0313063469.

The spelling of 2629861 in words is "two million, six hundred twenty-nine thousand, eight hundred sixty-one".