2801649 has 4 divisors (see below), whose sum is σ = 3735536. Its totient is φ = 1867764.

The previous prime is 2801641. The next prime is 2801681. The reversal of 2801649 is 9461082.

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 2801649 - 2³ = 2801641 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2801641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 466939 + ... + 466944.

It is an arithmetic number, because the mean of its divisors is an integer number (933884).

2^2801649 is an apocalyptic number.

It is an amenable number.

2801649 is a deficient number, since it is larger than the sum of its proper divisors (933887).

2801649 is an equidigital number, since it uses as much as digits as its factorization.

2801649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933886.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2801649 is about 1673.8127135376. The cubic root of 2801649 is about 140.9736382485.

The spelling of 2801649 in words is "two million, eight hundred one thousand, six hundred forty-nine".