255045421 has 4 divisors (see below), whose sum is σ = 255084700. Its totient is φ = 255006144.

The previous prime is 255045409. The next prime is 255045433. The reversal of 255045421 is 124540552.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (255045409) and next prime (255045433).

It can be written as a sum of positive squares in 2 ways, for example, as 71740900 + 183304521 = 8470^2 + 13539^2 .

It is a cyclic number.

It is not a de Polignac number, because 255045421 - 2¹³ = 255037229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 255045421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255045481) 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, 7326 + ... + 23743.

It is an arithmetic number, because the mean of its divisors is an integer number (63771175).

Almost surely, 2^255045421 is an apocalyptic number.

It is an amenable number.

255045421 is a deficient number, since it is larger than the sum of its proper divisors (39279).

255045421 is an equidigital number, since it uses as much as digits as its factorization.

255045421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39278.

The product of its (nonzero) digits is 8000, while the sum is 28.

The square root of 255045421 is about 15970.1415460227. The cubic root of 255045421 is about 634.1702191993.

Adding to 255045421 its reverse (124540552), we get a palindrome (379585973).

The spelling of 255045421 in words is "two hundred fifty-five million, forty-five thousand, four hundred twenty-one".