2812247 has 4 divisors (see below), whose sum is σ = 2960280. Its totient is φ = 2664216.

The previous prime is 2812241. The next prime is 2812261. The reversal of 2812247 is 7422182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7422182 = 2 ⋅3711091.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2812247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2812241) 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, 73988 + ... + 74025.

It is an arithmetic number, because the mean of its divisors is an integer number (740070).

2^2812247 is an apocalyptic number.

2812247 is a deficient number, since it is larger than the sum of its proper divisors (148033).

2812247 is a wasteful number, since it uses less digits than its factorization.

2812247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148032.

The product of its digits is 1792, while the sum is 26.

The square root of 2812247 is about 1676.9755514020. The cubic root of 2812247 is about 141.1511716343.

The spelling of 2812247 in words is "two million, eight hundred twelve thousand, two hundred forty-seven".