1530256261 has 2 divisors, whose sum is σ = 1530256262. Its totient is φ = 1530256260.

The previous prime is 1530256223. The next prime is 1530256267. The reversal of 1530256261 is 1626520351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1491890625 + 38365636 = 38625^2 + 6194^2 .

It is a cyclic number.

It is not a de Polignac number, because 1530256261 - 2¹⁵ = 1530223493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1530256267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765128130 + 765128131.

It is an arithmetic number, because the mean of its divisors is an integer number (765128131).

Almost surely, 2^1530256261 is an apocalyptic number.

It is an amenable number.

1530256261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1530256261 is an equidigital number, since it uses as much as digits as its factorization.

1530256261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1530256261 is about 39118.4900143142. The cubic root of 1530256261 is about 1152.3596818956.

The spelling of 1530256261 in words is "one billion, five hundred thirty million, two hundred fifty-six thousand, two hundred sixty-one".