2154399 has 16 divisors (see below), whose sum is σ = 3179232. Its totient is φ = 1289088.

The previous prime is 2154389. The next prime is 2154413. The reversal of 2154399 is 9934512.

It is not a de Polignac number, because 2154399 - 2⁸ = 2154143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 697 + ... + 2189.

It is an arithmetic number, because the mean of its divisors is an integer number (198702).

2^2154399 is an apocalyptic number.

2154399 is a deficient number, since it is larger than the sum of its proper divisors (1024833).

2154399 is a wasteful number, since it uses less digits than its factorization.

2154399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1546.

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

The square root of 2154399 is about 1467.7871099039. The cubic root of 2154399 is about 129.1542533105.

The spelling of 2154399 in words is "two million, one hundred fifty-four thousand, three hundred ninety-nine".