138142004 has 48 divisors (see below), whose sum is σ = 324594816. Its totient is φ = 49680000.

The previous prime is 138142001. The next prime is 138142013. The reversal of 138142004 is 400241831.

138142004 = 911² + 912² + ... + 1053².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138142001) 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 15 ways as a sum of consecutive naturals, for example, 13247 + ... + 21254.

It is an arithmetic number, because the mean of its divisors is an integer number (6762392).

Almost surely, 2^138142004 is an apocalyptic number.

138142004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

138142004 is an abundant number, since it is smaller than the sum of its proper divisors (186452812).

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

138142004 is a wasteful number, since it uses less digits than its factorization.

138142004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34536 (or 34534 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 138142004 is about 11753.3826620254. The cubic root of 138142004 is about 516.9421173383.

Adding to 138142004 its reverse (400241831), we get a palindrome (538383835).

The spelling of 138142004 in words is "one hundred thirty-eight million, one hundred forty-two thousand, four".