2104947 has 20 divisors (see below), whose sum is σ = 3388000. Its totient is φ = 1294704.

The previous prime is 2104933. The next prime is 2104951. The reversal of 2104947 is 7494012.

It is a happy number.

It is not a de Polignac number, because 2104947 - 2¹⁵ = 2072179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 2104947.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104987) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54 + ... + 2052.

It is an arithmetic number, because the mean of its divisors is an integer number (169400).

2^2104947 is an apocalyptic number.

2104947 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2104947 is a deficient number, since it is larger than the sum of its proper divisors (1283053).

2104947 is a wasteful number, since it uses less digits than its factorization.

2104947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2015 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2104947 is about 1450.8435477335. The cubic root of 2104947 is about 128.1583935960.

Adding to 2104947 its reverse (7494012), we get a palindrome (9598959).

The spelling of 2104947 in words is "two million, one hundred four thousand, nine hundred forty-seven".