2149965 has 12 divisors (see below), whose sum is σ = 3726684. Its totient is φ = 1146624.

The previous prime is 2149937. The next prime is 2149991. The reversal of 2149965 is 5699412.

It can be written as a sum of positive squares in 2 ways, for example, as 1127844 + 1022121 = 1062^2 + 1011^2 .

It is not a de Polignac number, because 2149965 - 2⁵ = 2149933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23844 + ... + 23933.

It is an arithmetic number, because the mean of its divisors is an integer number (310557).

2^2149965 is an apocalyptic number.

It is an amenable number.

2149965 is a deficient number, since it is larger than the sum of its proper divisors (1576719).

2149965 is a wasteful number, since it uses less digits than its factorization.

2149965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47788 (or 47785 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2149965 is about 1466.2758949120. The cubic root of 2149965 is about 129.0655877039.

The spelling of 2149965 in words is "two million, one hundred forty-nine thousand, nine hundred sixty-five".