1020256253 has 2 divisors, whose sum is σ = 1020256254. Its totient is φ = 1020256252.

The previous prime is 1020256219. The next prime is 1020256271. The reversal of 1020256253 is 3526520201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 534626884 + 485629369 = 23122^2 + 22037^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020256253 - 2⁶ = 1020256189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1020256553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510128126 + 510128127.

It is an arithmetic number, because the mean of its divisors is an integer number (510128127).

Almost surely, 2^1020256253 is an apocalyptic number.

It is an amenable number.

1020256253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020256253 is an equidigital number, since it uses as much as digits as its factorization.

1020256253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 1020256253 is about 31941.4503897365. The cubic root of 1020256253 is about 1006.7069999166.

Adding to 1020256253 its reverse (3526520201), we get a palindrome (4546776454).

The spelling of 1020256253 in words is "one billion, twenty million, two hundred fifty-six thousand, two hundred fifty-three".