2146945 has 4 divisors (see below), whose sum is σ = 2576340. Its totient is φ = 1717552.

The previous prime is 2146939. The next prime is 2146979. The reversal of 2146945 is 5496412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1481089 + 665856 = 1217^2 + 816^2 .

It is a cyclic number.

It is not a de Polignac number, because 2146945 - 2⁷ = 2146817 is a prime.

It is a d-powerful number, because it can be written as 2 + 1 + 4¹⁰ + 6⁶ + 9 + 4¹⁰ + 5⁵ .

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214690 + ... + 214699.

It is an arithmetic number, because the mean of its divisors is an integer number (644085).

2^2146945 is an apocalyptic number.

It is an amenable number.

2146945 is a deficient number, since it is larger than the sum of its proper divisors (429395).

2146945 is an equidigital number, since it uses as much as digits as its factorization.

2146945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429394.

The product of its digits is 8640, while the sum is 31.

The square root of 2146945 is about 1465.2457131826. The cubic root of 2146945 is about 129.0051276931.

The spelling of 2146945 in words is "two million, one hundred forty-six thousand, nine hundred forty-five".