2644971 has 24 divisors (see below), whose sum is σ = 4322880. Its totient is φ = 1430352.

The previous prime is 2644927. The next prime is 2644981. The reversal of 2644971 is 1794462.

It is a happy number.

It is not a de Polignac number, because 2644971 - 2⁶ = 2644907 is a prime.

2644971 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2644921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2320 + ... + 3266.

It is an arithmetic number, because the mean of its divisors is an integer number (180120).

2^2644971 is an apocalyptic number.

2644971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2644971 is a deficient number, since it is larger than the sum of its proper divisors (1677909).

2644971 is a wasteful number, since it uses less digits than its factorization.

2644971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 976 counting only the distinct ones).

The product of its digits is 12096, while the sum is 33.

The square root of 2644971 is about 1626.3366810104. The cubic root of 2644971 is about 138.2951569626.

The spelling of 2644971 in words is "two million, six hundred forty-four thousand, nine hundred seventy-one".