130278521 has 2 divisors, whose sum is σ = 130278522. Its totient is φ = 130278520.

The previous prime is 130278481. The next prime is 130278529. The reversal of 130278521 is 125872031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130210921 + 67600 = 11411^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 130278521 - 2²⁶ = 63169657 is a prime.

It is not a weakly prime, because it can be changed into another prime (130278529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65139260 + 65139261.

It is an arithmetic number, because the mean of its divisors is an integer number (65139261).

Almost surely, 2^130278521 is an apocalyptic number.

It is an amenable number.

130278521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130278521 is an equidigital number, since it uses as much as digits as its factorization.

130278521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 130278521 is about 11413.9616698147. The cubic root of 130278521 is about 506.9412209931.

The spelling of 130278521 in words is "one hundred thirty million, two hundred seventy-eight thousand, five hundred twenty-one".