130781061 has 20 divisors (see below), whose sum is σ = 195847212. Its totient is φ = 86971968.

The previous prime is 130781041. The next prime is 130781081. The reversal of 130781061 is 160187031.

It is an interprime number because it is at equal distance from previous prime (130781041) and next prime (130781081).

It can be written as a sum of positive squares in 2 ways, for example, as 110124036 + 20657025 = 10494^2 + 4545^2 .

It is not a de Polignac number, because 130781061 - 2⁶ = 130780997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130781041) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 35251 + ... + 38783.

Almost surely, 2^130781061 is an apocalyptic number.

It is an amenable number.

130781061 is a deficient number, since it is larger than the sum of its proper divisors (65066151).

130781061 is an equidigital number, since it uses as much as digits as its factorization.

130781061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002 (or 3993 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 130781061 is about 11435.9547480742. The cubic root of 130781061 is about 507.5922143903.

The spelling of 130781061 in words is "one hundred thirty million, seven hundred eighty-one thousand, sixty-one".