1230540881 has 2 divisors, whose sum is σ = 1230540882. Its totient is φ = 1230540880.

The previous prime is 1230540821. The next prime is 1230540901. The reversal of 1230540881 is 1880450321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664814656 + 565726225 = 25784^2 + 23785^2 .

It is an emirp because it is prime and its reverse (1880450321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1230540881 - 2¹⁰ = 1230539857 is a prime.

It is a super-2 number, since 2×1230540881² = 3028461719624512322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1230540821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615270440 + 615270441.

It is an arithmetic number, because the mean of its divisors is an integer number (615270441).

Almost surely, 2^1230540881 is an apocalyptic number.

It is an amenable number.

1230540881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230540881 is an equidigital number, since it uses as much as digits as its factorization.

1230540881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 1230540881 is about 35079.0661363726. The cubic root of 1230540881 is about 1071.5982987693.

The spelling of 1230540881 in words is "one billion, two hundred thirty million, five hundred forty thousand, eight hundred eighty-one".