130542640 has 20 divisors (see below), whose sum is σ = 303511824. Its totient is φ = 52217024.

The previous prime is 130542637. The next prime is 130542683. The reversal of 130542640 is 46245031.

130542640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 815812 + ... + 815971.

Almost surely, 2^130542640 is an apocalyptic number.

130542640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130542640 is an abundant number, since it is smaller than the sum of its proper divisors (172969184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130542640 is a wasteful number, since it uses less digits than its factorization.

130542640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1631796 (or 1631790 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 130542640 is about 11425.5258084694. The cubic root of 130542640 is about 507.2835706682.

Adding to 130542640 its reverse (46245031), we get a palindrome (176787671).

The spelling of 130542640 in words is "one hundred thirty million, five hundred forty-two thousand, six hundred forty".