2455999 has 16 divisors (see below), whose sum is σ = 3060288. Its totient is φ = 1919232.

The previous prime is 2455987. The next prime is 2456011. The reversal of 2455999 is 9995542.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2455987) and next prime (2456011).

It is not a de Polignac number, because 2455999 - 2⁹ = 2455487 is a prime.

It is a plaindrome in base 10 and base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2455909) 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, 12369 + ... + 12565.

It is an arithmetic number, because the mean of its divisors is an integer number (191268).

2^2455999 is an apocalyptic number.

2455999 is a deficient number, since it is larger than the sum of its proper divisors (604289).

2455999 is a wasteful number, since it uses less digits than its factorization.

2455999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354.

The product of its digits is 145800, while the sum is 43.

The square root of 2455999 is about 1567.1627228849. The cubic root of 2455999 is about 134.9199159225.

It can be divided in two parts, 245 and 5999, that multiplied together give a triangular number (1469755 = T₁₇₁₄).

The spelling of 2455999 in words is "two million, four hundred fifty-five thousand, nine hundred ninety-nine".