2631005 has 16 divisors (see below), whose sum is σ = 3601584. Its totient is φ = 1827840.

The previous prime is 2630989. The next prime is 2631007. The reversal of 2631005 is 5001362.

2631005 = T₃₀ + T₃₁ + ... + T₂₅₀.

It can be written as a sum of positive squares in 8 ways, for example, as 597529 + 2033476 = 773^2 + 1426^2 .

It is not a de Polignac number, because 2631005 - 2⁴ = 2630989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2631007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86 + ... + 2295.

It is an arithmetic number, because the mean of its divisors is an integer number (225099).

2^2631005 is an apocalyptic number.

It is an amenable number.

2631005 is a deficient number, since it is larger than the sum of its proper divisors (970579).

2631005 is a wasteful number, since it uses less digits than its factorization.

2631005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2416.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 2631005 is about 1622.0372992012. The cubic root of 2631005 is about 138.0513181680.

Adding to 2631005 its reverse (5001362), we get a palindrome (7632367).

The spelling of 2631005 in words is "two million, six hundred thirty-one thousand, five".