2191245 has 32 divisors (see below), whose sum is σ = 4112640. Its totient is φ = 975360.

The previous prime is 2191243. The next prime is 2191247. The reversal of 2191245 is 5421912.

It is an interprime number because it is at equal distance from previous prime (2191243) and next prime (2191247).

It is not a de Polignac number, because 2191245 - 2¹ = 2191243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4051 + ... + 4559.

It is an arithmetic number, because the mean of its divisors is an integer number (128520).

2^2191245 is an apocalyptic number.

It is an amenable number.

2191245 is a deficient number, since it is larger than the sum of its proper divisors (1921395).

2191245 is a wasteful number, since it uses less digits than its factorization.

2191245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565.

The product of its digits is 720, while the sum is 24.

The square root of 2191245 is about 1480.2854454462. The cubic root of 2191245 is about 129.8863898942.

The spelling of 2191245 in words is "two million, one hundred ninety-one thousand, two hundred forty-five".