1026255221 has 2 divisors, whose sum is σ = 1026255222. Its totient is φ = 1026255220.

The previous prime is 1026255211. The next prime is 1026255289. The reversal of 1026255221 is 1225526201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 954192100 + 72063121 = 30890^2 + 8489^2 .

It is a cyclic number.

It is not a de Polignac number, because 1026255221 - 2¹⁸ = 1025993077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1026255211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 513127610 + 513127611.

It is an arithmetic number, because the mean of its divisors is an integer number (513127611).

Almost surely, 2^1026255221 is an apocalyptic number.

It is an amenable number.

1026255221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1026255221 is an equidigital number, since it uses as much as digits as its factorization.

1026255221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1026255221 is about 32035.2184478271. The cubic root of 1026255221 is about 1008.6762453913.

The spelling of 1026255221 in words is "one billion, twenty-six million, two hundred fifty-five thousand, two hundred twenty-one".