2145399 has 8 divisors (see below), whose sum is σ = 2927232. Its totient is φ = 1396920.

The previous prime is 2145389. The next prime is 2145401. The reversal of 2145399 is 9935412.

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

It is not a de Polignac number, because 2145399 - 2¹⁵ = 2112631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145329) 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, 8187 + ... + 8444.

It is an arithmetic number, because the mean of its divisors is an integer number (365904).

2^2145399 is an apocalyptic number.

2145399 is a deficient number, since it is larger than the sum of its proper divisors (781833).

2145399 is a wasteful number, since it uses less digits than its factorization.

2145399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16677.

The product of its digits is 9720, while the sum is 33.

The square root of 2145399 is about 1464.7180616078. The cubic root of 2145399 is about 128.9741550291.

The spelling of 2145399 in words is "two million, one hundred forty-five thousand, three hundred ninety-nine".