2649851 has 2 divisors, whose sum is σ = 2649852. Its totient is φ = 2649850.

The previous prime is 2649821. The next prime is 2649863. The reversal of 2649851 is 1589462.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2649851 - 2¹⁰ = 2648827 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2649811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1324925 + 1324926.

It is an arithmetic number, because the mean of its divisors is an integer number (1324926).

2^2649851 is an apocalyptic number.

2649851 is a deficient number, since it is larger than the sum of its proper divisors (1).

2649851 is an equidigital number, since it uses as much as digits as its factorization.

2649851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 35.

The square root of 2649851 is about 1627.8362939804. The cubic root of 2649851 is about 138.3801567272.

The spelling of 2649851 in words is "two million, six hundred forty-nine thousand, eight hundred fifty-one".