2129385 has 8 divisors (see below), whose sum is σ = 3407040. Its totient is φ = 1135664.

The previous prime is 2129371. The next prime is 2129389. The reversal of 2129385 is 5839212.

It is a happy number.

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 2129385 - 2⁵ = 2129353 is a prime.

2129385 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2129389) 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, 70965 + ... + 70994.

It is an arithmetic number, because the mean of its divisors is an integer number (425880).

2^2129385 is an apocalyptic number.

It is an amenable number.

2129385 is a deficient number, since it is larger than the sum of its proper divisors (1277655).

2129385 is a wasteful number, since it uses less digits than its factorization.

2129385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141967.

The product of its digits is 4320, while the sum is 30.

The square root of 2129385 is about 1459.2412411935. The cubic root of 2129385 is about 128.6524506951.

The spelling of 2129385 in words is "two million, one hundred twenty-nine thousand, three hundred eighty-five".