2105247 has 8 divisors (see below), whose sum is σ = 2845744. Its totient is φ = 1384128.

The previous prime is 2105231. The next prime is 2105251. The reversal of 2105247 is 7425012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2105247 - 2⁴ = 2105231 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 (2105267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4588 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (355718).

2^2105247 is an apocalyptic number.

2105247 is a deficient number, since it is larger than the sum of its proper divisors (740497).

2105247 is an equidigital number, since it uses as much as digits as its factorization.

2105247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9689.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 2105247 is about 1450.9469321791. The cubic root of 2105247 is about 128.1644817448.

It can be divided in two parts, 210 and 5247, that multiplied together give a triangular number (1101870 = T₁₄₈₄).

The spelling of 2105247 in words is "two million, one hundred five thousand, two hundred forty-seven".