255420001 has 4 divisors (see below), whose sum is σ = 257369904. Its totient is φ = 253470100.

The previous prime is 255419977. The next prime is 255420007. The reversal of 255420001 is 100024552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255420001 - 2²⁵ = 221865569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255420007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 974755 + ... + 975016.

It is an arithmetic number, because the mean of its divisors is an integer number (64342476).

Almost surely, 2^255420001 is an apocalyptic number.

It is an amenable number.

255420001 is a deficient number, since it is larger than the sum of its proper divisors (1949903).

255420001 is a wasteful number, since it uses less digits than its factorization.

255420001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949902.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 255420001 is about 15981.8647535261. The cubic root of 255420001 is about 634.4805316146.

Adding to 255420001 its reverse (100024552), we get a palindrome (355444553).

The spelling of 255420001 in words is "two hundred fifty-five million, four hundred twenty thousand, one".