255242405 has 16 divisors (see below), whose sum is σ = 337587264. Its totient is φ = 183713280.

The previous prime is 255242389. The next prime is 255242417. The reversal of 255242405 is 504242552.

It is not a de Polignac number, because 255242405 - 2⁴ = 255242389 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18587 + ... + 29256.

It is an arithmetic number, because the mean of its divisors is an integer number (21099204).

Almost surely, 2^255242405 is an apocalyptic number.

It is an amenable number.

255242405 is a deficient number, since it is larger than the sum of its proper divisors (82344859).

255242405 is a wasteful number, since it uses less digits than its factorization.

255242405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47956.

The product of its (nonzero) digits is 16000, while the sum is 29.

The square root of 255242405 is about 15976.3076147150. The cubic root of 255242405 is about 634.3334440330. Note that the first 3 decimals are identical.

Adding to 255242405 its reverse (504242552), we get a palindrome (759484957).

The spelling of 255242405 in words is "two hundred fifty-five million, two hundred forty-two thousand, four hundred five".