2125817 has 4 divisors (see below), whose sum is σ = 2146560. Its totient is φ = 2105076.

The previous prime is 2125813. The next prime is 2125819. The reversal of 2125817 is 7185212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2125817 - 2² = 2125813 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 3 ways as a sum of consecutive naturals, for example, 10217 + ... + 10422.

It is an arithmetic number, because the mean of its divisors is an integer number (536640).

2^2125817 is an apocalyptic number.

It is an amenable number.

2125817 is a deficient number, since it is larger than the sum of its proper divisors (20743).

2125817 is a wasteful number, since it uses less digits than its factorization.

2125817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20742.

The product of its digits is 1120, while the sum is 26.

The square root of 2125817 is about 1458.0181754697. The cubic root of 2125817 is about 128.5805537909.

The spelling of 2125817 in words is "two million, one hundred twenty-five thousand, eight hundred seventeen".