2146905 has 56 divisors (see below), whose sum is σ = 4197120. Its totient is φ = 1049760.

The previous prime is 2146897. The next prime is 2146909. The reversal of 2146905 is 5096412.

It is not a de Polignac number, because 2146905 - 2³ = 2146897 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2146909) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 69240 + ... + 69270.

2^2146905 is an apocalyptic number.

It is an amenable number.

2146905 is a deficient number, since it is larger than the sum of its proper divisors (2050215).

2146905 is an equidigital number, since it uses as much as digits as its factorization.

2146905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 2146905 is about 1465.2320635312. The cubic root of 2146905 is about 129.0043265180.

The spelling of 2146905 in words is "two million, one hundred forty-six thousand, nine hundred five".