1230551281 has 2 divisors, whose sum is σ = 1230551282. Its totient is φ = 1230551280.

The previous prime is 1230551269. The next prime is 1230551299. The reversal of 1230551281 is 1821550321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1226120256 + 4431025 = 35016^2 + 2105^2 .

It is a cyclic number.

It is not a de Polignac number, because 1230551281 - 2²³ = 1222162673 is a prime.

It is a super-2 number, since 2×1230551281² = 3028512910341481922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1230551261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615275640 + 615275641.

It is an arithmetic number, because the mean of its divisors is an integer number (615275641).

Almost surely, 2^1230551281 is an apocalyptic number.

It is an amenable number.

1230551281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230551281 is an equidigital number, since it uses as much as digits as its factorization.

1230551281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 1230551281 is about 35079.2143726167. The cubic root of 1230551281 is about 1071.6013176561.

The spelling of 1230551281 in words is "one billion, two hundred thirty million, five hundred fifty-one thousand, two hundred eighty-one".