130705845 has 32 divisors (see below), whose sum is σ = 222652800. Its totient is φ = 65286144.

The previous prime is 130705837. The next prime is 130705847. The reversal of 130705845 is 548507031.

It is not a de Polignac number, because 130705845 - 2³ = 130705837 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130705847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22789 + ... + 27941.

It is an arithmetic number, because the mean of its divisors is an integer number (6957900).

Almost surely, 2^130705845 is an apocalyptic number.

130705845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

130705845 is a deficient number, since it is larger than the sum of its proper divisors (91946955).

130705845 is a wasteful number, since it uses less digits than its factorization.

130705845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5269.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 130705845 is about 11432.6656996520. The cubic root of 130705845 is about 507.4948853699.

It can be divided in two parts, 13070 and 5845, that added together give a triangular number (18915 = T₁₉₄).

The spelling of 130705845 in words is "one hundred thirty million, seven hundred five thousand, eight hundred forty-five".