2125811 has 8 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 2063880.

The previous prime is 2125801. The next prime is 2125813. The reversal of 2125811 is 1185212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2125813) 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, 5420 + ... + 5798.

It is an arithmetic number, because the mean of its divisors is an integer number (273600).

2^2125811 is an apocalyptic number.

2125811 is a deficient number, since it is larger than the sum of its proper divisors (62989).

2125811 is an equidigital number, since it uses as much as digits as its factorization.

2125811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529.

The product of its digits is 160, while the sum is 20.

The square root of 2125811 is about 1458.0161178807. The cubic root of 2125811 is about 128.5804328203.

The spelling of 2125811 in words is "two million, one hundred twenty-five thousand, eight hundred eleven".