1630455121 has 2 divisors, whose sum is σ = 1630455122. Its totient is φ = 1630455120.

The previous prime is 1630455097. The next prime is 1630455133. The reversal of 1630455121 is 1215540361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1271920896 + 358534225 = 35664^2 + 18935^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1630455121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1630455121.

It is not a weakly prime, because it can be changed into another prime (1630455181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 815227560 + 815227561.

It is an arithmetic number, because the mean of its divisors is an integer number (815227561).

Almost surely, 2^1630455121 is an apocalyptic number.

It is an amenable number.

1630455121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1630455121 is an equidigital number, since it uses as much as digits as its factorization.

1630455121 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 28.

The square root of 1630455121 is about 40378.8944994783. The cubic root of 1630455121 is about 1176.9814452702.

Adding to 1630455121 its reverse (1215540361), we get a palindrome (2845995482).

The spelling of 1630455121 in words is "one billion, six hundred thirty million, four hundred fifty-five thousand, one hundred twenty-one".