2129245 has 8 divisors (see below), whose sum is σ = 2566584. Its totient is φ = 1695744.

The previous prime is 2129227. The next prime is 2129261. The reversal of 2129245 is 5429212.

It can be written as a sum of positive squares in 4 ways, for example, as 599076 + 1530169 = 774^2 + 1237^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2129245 - 2⁵ = 2129213 is a prime.

It is a d-powerful number, because it can be written as 2 + 1 + 2²⁰ + 9² + 2²⁰ + 4⁷ + 5⁶ .

It is a Duffinian number.

2129245 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (320823).

2^2129245 is an apocalyptic number.

It is an amenable number.

2129245 is a deficient number, since it is larger than the sum of its proper divisors (437339).

2129245 is a wasteful number, since it uses less digits than its factorization.

2129245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1919.

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

The square root of 2129245 is about 1459.1932702696. The cubic root of 2129245 is about 128.6496311427.

The spelling of 2129245 in words is "two million, one hundred twenty-nine thousand, two hundred forty-five".