255601409 has 8 divisors (see below), whose sum is σ = 309299328. Its totient is φ = 206199360.

The previous prime is 255601399. The next prime is 255601469. The reversal of 255601409 is 904106552.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 255601409 - 2¹⁶ = 255535873 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (255601469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073837 + ... + 1074074.

It is an arithmetic number, because the mean of its divisors is an integer number (38662416).

Almost surely, 2^255601409 is an apocalyptic number.

It is an amenable number.

255601409 is a deficient number, since it is larger than the sum of its proper divisors (53697919).

255601409 is a wasteful number, since it uses less digits than its factorization.

255601409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2147935.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 255601409 is about 15987.5391789981. The cubic root of 255601409 is about 634.6307059749.

The spelling of 255601409 in words is "two hundred fifty-five million, six hundred one thousand, four hundred nine".