2197129 has 4 divisors (see below), whose sum is σ = 2396880. Its totient is φ = 1997380.

The previous prime is 2197087. The next prime is 2197157. The reversal of 2197129 is 9217912.

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 de Polignac number, because none of the positive numbers 2^k-2197129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2197129.

It is not an unprimeable number, because it can be changed into a prime (2197189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99859 + ... + 99880.

It is an arithmetic number, because the mean of its divisors is an integer number (599220).

2^2197129 is an apocalyptic number.

It is an amenable number.

2197129 is a deficient number, since it is larger than the sum of its proper divisors (199751).

2197129 is a wasteful number, since it uses less digits than its factorization.

2197129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199750.

The product of its digits is 2268, while the sum is 31.

The square root of 2197129 is about 1482.2715675611. The cubic root of 2197129 is about 130.0025443289.

The spelling of 2197129 in words is "two million, one hundred ninety-seven thousand, one hundred twenty-nine".