2649505 has 8 divisors (see below), whose sum is σ = 3192552. Its totient is φ = 2110848.

The previous prime is 2649503. The next prime is 2649529. The reversal of 2649505 is 5059462.

It can be written as a sum of positive squares in 4 ways, for example, as 314721 + 2334784 = 561^2 + 1528^2 .

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 2649505 - 2¹ = 2649503 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2649503) 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, 429 + ... + 2341.

It is an arithmetic number, because the mean of its divisors is an integer number (399069).

2^2649505 is an apocalyptic number.

It is an amenable number.

2649505 is a deficient number, since it is larger than the sum of its proper divisors (543047).

2649505 is a wasteful number, since it uses less digits than its factorization.

2649505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2649505 is about 1627.7300144680. The cubic root of 2649505 is about 138.3741335434.

The spelling of 2649505 in words is "two million, six hundred forty-nine thousand, five hundred five".