130722445 has 20 divisors (see below), whose sum is σ = 183017340. Its totient is φ = 89630016.

The previous prime is 130722437. The next prime is 130722457. The reversal of 130722445 is 544227031.

It can be written as a sum of positive squares in 2 ways, for example, as 20766249 + 109956196 = 4557^2 + 10486^2 .

It is not a de Polignac number, because 130722445 - 2³ = 130722437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6561 + ... + 17449.

It is an arithmetic number, because the mean of its divisors is an integer number (9150867).

Almost surely, 2^130722445 is an apocalyptic number.

It is an amenable number.

130722445 is a deficient number, since it is larger than the sum of its proper divisors (52294895).

130722445 is an frugal number, since it uses more digits than its factorization.

130722445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10922 (or 10901 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 130722445 is about 11433.3916665179. The cubic root of 130722445 is about 507.5163688735.

Adding to 130722445 its reverse (544227031), we get a palindrome (674949476).

The spelling of 130722445 in words is "one hundred thirty million, seven hundred twenty-two thousand, four hundred forty-five".