2145306 has 8 divisors (see below), whose sum is σ = 4290624. Its totient is φ = 715100.

The previous prime is 2145289. The next prime is 2145307. The reversal of 2145306 is 6035412.

It is a happy number.

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

2145306 is an admirable number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (2145307) 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, 178770 + ... + 178781.

It is an arithmetic number, because the mean of its divisors is an integer number (536328).

2^2145306 is an apocalyptic number.

2145306 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145306 is a wasteful number, since it uses less digits than its factorization.

2145306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357556.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2145306 is about 1464.6863145397. The cubic root of 2145306 is about 128.9722913866.

The spelling of 2145306 in words is "two million, one hundred forty-five thousand, three hundred six".