130321920 has 160 divisors (see below), whose sum is σ = 424258560. Its totient is φ = 34119680.

The previous prime is 130321907. The next prime is 130321921. The reversal of 130321920 is 29123031.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130321921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545161 + ... + 545399.

It is an arithmetic number, because the mean of its divisors is an integer number (2651616).

Almost surely, 2^130321920 is an apocalyptic number.

130321920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 130321920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212129280).

130321920 is an abundant number, since it is smaller than the sum of its proper divisors (293936640).

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

130321920 is an equidigital number, since it uses as much as digits as its factorization.

130321920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 320 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 130321920 is about 11415.8626480875. The cubic root of 130321920 is about 506.9975062998.

Adding to 130321920 its reverse (29123031), we get a palindrome (159444951).

The spelling of 130321920 in words is "one hundred thirty million, three hundred twenty-one thousand, nine hundred twenty".