138720130 has 16 divisors (see below), whose sum is σ = 260553024. Its totient is φ = 53075440.

The previous prime is 138720089. The next prime is 138720157. The reversal of 138720130 is 31027831.

It is a junction number, because it is equal to n+sod(n) for n = 138720095 and 138720104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301336 + ... + 301795.

It is an arithmetic number, because the mean of its divisors is an integer number (16284564).

Almost surely, 2^138720130 is an apocalyptic number.

138720130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138720130 is a deficient number, since it is larger than the sum of its proper divisors (121832894).

138720130 is a wasteful number, since it uses less digits than its factorization.

138720130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 603161.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 138720130 is about 11777.9510102564. The cubic root of 138720130 is about 517.6622500732.

Adding to 138720130 its reverse (31027831), we get a palindrome (169747961).

The spelling of 138720130 in words is "one hundred thirty-eight million, seven hundred twenty thousand, one hundred thirty".