130726557 has 12 divisors (see below), whose sum is σ = 203352604. Its totient is φ = 80447040.

The previous prime is 130726553. The next prime is 130726559. The reversal of 130726557 is 755627031.

130726557 is a `hidden beast` number, since 1 + 30 + 72 + 6 + 557 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 67667076 + 63059481 = 8226^2 + 7941^2 .

It is not a de Polignac number, because 130726557 - 2² = 130726553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130726553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 558544 + ... + 558777.

Almost surely, 2^130726557 is an apocalyptic number.

It is an amenable number.

130726557 is a deficient number, since it is larger than the sum of its proper divisors (72626047).

130726557 is a wasteful number, since it uses less digits than its factorization.

130726557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117340 (or 1117337 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 130726557 is about 11433.5714892592. The cubic root of 130726557 is about 507.5216902893.

The spelling of 130726557 in words is "one hundred thirty million, seven hundred twenty-six thousand, five hundred fifty-seven".