130240921 has 2 divisors, whose sum is σ = 130240922. Its totient is φ = 130240920.

The previous prime is 130240853. The next prime is 130240949. The reversal of 130240921 is 129042031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 13838400 = 10789^2 + 3720^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130240921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130240892 and 130240901.

It is not a weakly prime, because it can be changed into another prime (130240321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65120460 + 65120461.

It is an arithmetic number, because the mean of its divisors is an integer number (65120461).

Almost surely, 2^130240921 is an apocalyptic number.

It is an amenable number.

130240921 is a deficient number, since it is larger than the sum of its proper divisors (1).

130240921 is an equidigital number, since it uses as much as digits as its factorization.

130240921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 130240921 is about 11412.3144453700. The cubic root of 130240921 is about 506.8924464553.

Adding to 130240921 its reverse (129042031), we get a palindrome (259282952).

The spelling of 130240921 in words is "one hundred thirty million, two hundred forty thousand, nine hundred twenty-one".