2141665 has 8 divisors (see below), whose sum is σ = 2577960. Its totient is φ = 1708032.

The previous prime is 2141653. The next prime is 2141669. The reversal of 2141665 is 5661412.

It can be written as a sum of positive squares in 4 ways, for example, as 1296 + 2140369 = 36^2 + 1463^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141665 is a prime.

2141665 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141669) 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, 2401 + ... + 3169.

It is an arithmetic number, because the mean of its divisors is an integer number (322245).

2^2141665 is an apocalyptic number.

It is an amenable number.

2141665 is a deficient number, since it is larger than the sum of its proper divisors (436295).

2141665 is an equidigital number, since it uses as much as digits as its factorization.

2141665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331.

The product of its digits is 1440, while the sum is 25.

The square root of 2141665 is about 1463.4428584677. The cubic root of 2141665 is about 128.8992864129.

The spelling of 2141665 in words is "two million, one hundred forty-one thousand, six hundred sixty-five".