2129770 has 16 divisors (see below), whose sum is σ = 3878280. Its totient is φ = 841984.

The previous prime is 2129753. The next prime is 2129773. The reversal of 2129770 is 779212.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 720801 + 1408969 = 849^2 + 1187^2 .

It is not an unprimeable number, because it can be changed into a prime (2129773) 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, 307 + ... + 2086.

2^2129770 is an apocalyptic number.

2129770 is a deficient number, since it is larger than the sum of its proper divisors (1748510).

2129770 is a wasteful number, since it uses less digits than its factorization.

2129770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489.

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 2129770 is about 1459.3731531038. The cubic root of 2129770 is about 128.6602038270.

It can be divided in two parts, 21 and 29770, that added together give a cube (29791 = 31³).

The spelling of 2129770 in words is "two million, one hundred twenty-nine thousand, seven hundred seventy".