138421104 has 20 divisors (see below), whose sum is σ = 357587976. Its totient is φ = 46140352.

The previous prime is 138421093. The next prime is 138421117. The reversal of 138421104 is 401124831.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1441839 + ... + 1441934.

Almost surely, 2^138421104 is an apocalyptic number.

It is an amenable number.

138421104 is an abundant number, since it is smaller than the sum of its proper divisors (219166872).

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

138421104 is a wasteful number, since it uses less digits than its factorization.

138421104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2883784 (or 2883778 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 138421104 is about 11765.2498486008. The cubic root of 138421104 is about 517.2900238008.

Adding to 138421104 its reverse (401124831), we get a palindrome (539545935).

The spelling of 138421104 in words is "one hundred thirty-eight million, four hundred twenty-one thousand, one hundred four".