130405140 has 120 divisors (see below), whose sum is σ = 413654472. Its totient is φ = 34387200.

The previous prime is 130405117. The next prime is 130405159. The reversal of 130405140 is 41504031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42458256 + 87946884 = 6516^2 + 9378^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 163222 + ... + 164018.

Almost surely, 2^130405140 is an apocalyptic number.

130405140 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 130405140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (206827236).

130405140 is an abundant number, since it is smaller than the sum of its proper divisors (283249332).

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

130405140 is a wasteful number, since it uses less digits than its factorization.

130405140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 908 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 130405140 is about 11419.5069946123. The cubic root of 130405140 is about 507.1054015658.

Adding to 130405140 its reverse (41504031), we get a palindrome (171909171).

The spelling of 130405140 in words is "one hundred thirty million, four hundred five thousand, one hundred forty".