1230645121 has 2 divisors, whose sum is σ = 1230645122. Its totient is φ = 1230645120.

The previous prime is 1230645103. The next prime is 1230645127. The reversal of 1230645121 is 1215460321.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1213546896 + 17098225 = 34836^2 + 4135^2 .

It is an emirp because it is prime and its reverse (1215460321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1230645121 - 2⁵ = 1230645089 is a prime.

It is a super-2 number, since 2×1230645121² = 3028974827682209282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1230645127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615322560 + 615322561.

It is an arithmetic number, because the mean of its divisors is an integer number (615322561).

Almost surely, 2^1230645121 is an apocalyptic number.

It is an amenable number.

1230645121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1230645121 is an equidigital number, since it uses as much as digits as its factorization.

1230645121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1230645121 is about 35080.5518913258. The cubic root of 1230645121 is about 1071.6285565349.

The spelling of 1230645121 in words is "one billion, two hundred thirty million, six hundred forty-five thousand, one hundred twenty-one".