130636261 has 4 divisors (see below), whose sum is σ = 149298592. Its totient is φ = 111973932.

The previous prime is 130636243. The next prime is 130636309. The reversal of 130636261 is 162636031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162636031 = 29 ⋅5608139.

It is not a de Polignac number, because 130636261 - 2⁷ = 130636133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130636661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9331155 + ... + 9331168.

It is an arithmetic number, because the mean of its divisors is an integer number (37324648).

Almost surely, 2^130636261 is an apocalyptic number.

It is an amenable number.

130636261 is a deficient number, since it is larger than the sum of its proper divisors (18662331).

130636261 is an equidigital number, since it uses as much as digits as its factorization.

130636261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18662330.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 130636261 is about 11429.6220847410. The cubic root of 130636261 is about 507.4048108656.

The spelling of 130636261 in words is "one hundred thirty million, six hundred thirty-six thousand, two hundred sixty-one".