2190247 has 4 divisors (see below), whose sum is σ = 2236896. Its totient is φ = 2143600.

The previous prime is 2190233. The next prime is 2190269. The reversal of 2190247 is 7420912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2190247 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2190217) 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, 23254 + ... + 23347.

It is an arithmetic number, because the mean of its divisors is an integer number (559224).

2^2190247 is an apocalyptic number.

2190247 is a deficient number, since it is larger than the sum of its proper divisors (46649).

2190247 is an equidigital number, since it uses as much as digits as its factorization.

2190247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46648.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 2190247 is about 1479.9483099082. The cubic root of 2190247 is about 129.8666680311.

The spelling of 2190247 in words is "two million, one hundred ninety thousand, two hundred forty-seven".