255142421 has 4 divisors (see below), whose sum is σ = 255816000. Its totient is φ = 254468844.

The previous prime is 255142403. The next prime is 255142439. The reversal of 255142421 is 124241552.

255142421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (255142403) and next prime (255142439).

It is a cyclic number.

It is not a de Polignac number, because 255142421 - 2⁶ = 255142357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (255142451) 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, 336221 + ... + 336978.

It is an arithmetic number, because the mean of its divisors is an integer number (63954000).

Almost surely, 2^255142421 is an apocalyptic number.

It is an amenable number.

255142421 is a deficient number, since it is larger than the sum of its proper divisors (673579).

255142421 is an equidigital number, since it uses as much as digits as its factorization.

255142421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673578.

The product of its digits is 3200, while the sum is 26.

The square root of 255142421 is about 15973.1781746777. The cubic root of 255142421 is about 634.2506058146.

Adding to 255142421 its reverse (124241552), we get a palindrome (379383973).

The spelling of 255142421 in words is "two hundred fifty-five million, one hundred forty-two thousand, four hundred twenty-one".