2639001 has 4 divisors (see below), whose sum is σ = 3518672. Its totient is φ = 1759332.

The previous prime is 2638973. The next prime is 2639041. The reversal of 2639001 is 1009362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2639001 - 2⁷ = 2638873 is a prime.

It is a D-number.

It is the 1625-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2639041) by changing a digit.

It is a nontrivial repunit in base 1624.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439831 + ... + 439836.

It is an arithmetic number, because the mean of its divisors is an integer number (879668).

2^2639001 is an apocalyptic number.

It is an amenable number.

2639001 is a deficient number, since it is larger than the sum of its proper divisors (879671).

2639001 is an equidigital number, since it uses as much as digits as its factorization.

2639001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879670.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 2639001 is about 1624.5002308402. The cubic root of 2639001 is about 138.1910292877.

It can be divided in two parts, 263900 and 1, that added together give a triangular number (263901 = T₇₂₆).

The spelling of 2639001 in words is "two million, six hundred thirty-nine thousand, one".