138620126 has 16 divisors (see below), whose sum is σ = 219590784. Its totient is φ = 65496024.

The previous prime is 138620123. The next prime is 138620129. The reversal of 138620126 is 621026831.

It is an interprime number because it is at equal distance from previous prime (138620123) and next prime (138620129).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138620123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14336 + ... + 21971.

It is an arithmetic number, because the mean of its divisors is an integer number (13724424).

Almost surely, 2^138620126 is an apocalyptic number.

138620126 is a deficient number, since it is larger than the sum of its proper divisors (80970658).

138620126 is a wasteful number, since it uses less digits than its factorization.

138620126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36415.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 138620126 is about 11773.7048544628. The cubic root of 138620126 is about 517.5378251114.

Adding to 138620126 its reverse (621026831), we get a palindrome (759646957).

It can be divided in two parts, 1386 and 20126, that added together give a palindrome (21512).

The spelling of 138620126 in words is "one hundred thirty-eight million, six hundred twenty thousand, one hundred twenty-six".