13425138 has 48 divisors (see below), whose sum is σ = 31272696. Its totient is φ = 4147200.

The previous prime is 13425133. The next prime is 13425149. The reversal of 13425138 is 83152431.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13417569 + 7569 = 3663^2 + 87^2 .

It is not an unprimeable number, because it can be changed into a prime (13425133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22038 + ... + 22638.

Almost surely, 2^13425138 is an apocalyptic number.

13425138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13425138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15636348).

13425138 is an abundant number, since it is smaller than the sum of its proper divisors (17847558).

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

13425138 is a wasteful number, since it uses less digits than its factorization.

13425138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 696 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 13425138 is about 3664.0330238686. The cubic root of 13425138 is about 237.6692083191.

Adding to 13425138 its reverse (83152431), we get a palindrome (96577569).

The spelling of 13425138 in words is "thirteen million, four hundred twenty-five thousand, one hundred thirty-eight".