2150669 has 4 divisors (see below), whose sum is σ = 2224860. Its totient is φ = 2076480.

The previous prime is 2150663. The next prime is 2150671. The reversal of 2150669 is 9660512.

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 1295044 + 855625 = 1138^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 2150669 - 2¹⁶ = 2085133 is a prime.

It is a super-2 number, since 2×2150669² = 9250754295122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 74161 = 2150669 / (2 + 1 + 5 + 0 + 6 + 6 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2150663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37052 + ... + 37109.

It is an arithmetic number, because the mean of its divisors is an integer number (556215).

2^2150669 is an apocalyptic number.

2150669 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

2150669 is a deficient number, since it is larger than the sum of its proper divisors (74191).

2150669 is an equidigital number, since it uses as much as digits as its factorization.

2150669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74190.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2150669 is about 1466.5159392247. The cubic root of 2150669 is about 129.0796735546.

The spelling of 2150669 in words is "two million, one hundred fifty thousand, six hundred sixty-nine".