2049651 has 8 divisors (see below), whose sum is σ = 3036560. Its totient is φ = 1366416.

The previous prime is 2049647. The next prime is 2049659. The reversal of 2049651 is 1569402.

2049651 is a `hidden beast` number, since 2 + 0 + 4 + 9 + 651 = 666.

It is not a de Polignac number, because 2049651 - 2² = 2049647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 75913 = 2049651 / (2 + 0 + 4 + 9 + 6 + 5 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2049659) 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 7 ways as a sum of consecutive naturals, for example, 37930 + ... + 37983.

It is an arithmetic number, because the mean of its divisors is an integer number (379570).

2^2049651 is an apocalyptic number.

2049651 is a deficient number, since it is larger than the sum of its proper divisors (986909).

2049651 is an equidigital number, since it uses as much as digits as its factorization.

2049651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75922 (or 75916 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2049651 is about 1431.6602250534. The cubic root of 2049651 is about 127.0261999803.

Subtracting from 2049651 its reverse (1569402), we obtain a square (480249 = 693²).

The spelling of 2049651 in words is "two million, forty-nine thousand, six hundred fifty-one".