255898421 has 2 divisors, whose sum is σ = 255898422. Its totient is φ = 255898420.

The previous prime is 255898381. The next prime is 255898429. The reversal of 255898421 is 124898552.

255898421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254753521 + 1144900 = 15961^2 + 1070^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255898421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255898429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127949210 + 127949211.

It is an arithmetic number, because the mean of its divisors is an integer number (127949211).

Almost surely, 2^255898421 is an apocalyptic number.

It is an amenable number.

255898421 is a deficient number, since it is larger than the sum of its proper divisors (1).

255898421 is an equidigital number, since it uses as much as digits as its factorization.

255898421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 230400, while the sum is 44.

The square root of 255898421 is about 15996.8253412982. The cubic root of 255898421 is about 634.8764270668.

The spelling of 255898421 in words is "two hundred fifty-five million, eight hundred ninety-eight thousand, four hundred twenty-one".