13521426 has 32 divisors (see below), whose sum is σ = 30144960. Its totient is φ = 4018176.

The previous prime is 13521421. The next prime is 13521437. The reversal of 13521426 is 62412531.

It is a super-2 number, since 2×13521426² = 365657922146952, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13521396 and 13521405.

It is not an unprimeable number, because it can be changed into a prime (13521421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1551 + ... + 5426.

It is an arithmetic number, because the mean of its divisors is an integer number (942030).

Almost surely, 2^13521426 is an apocalyptic number.

13521426 is an abundant number, since it is smaller than the sum of its proper divisors (16623534).

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

13521426 is a wasteful number, since it uses less digits than its factorization.

13521426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7018.

The product of its digits is 1440, while the sum is 24.

The square root of 13521426 is about 3677.1491674938. The cubic root of 13521426 is about 238.2360603040.

Adding to 13521426 its reverse (62412531), we get a palindrome (75933957).

The spelling of 13521426 in words is "thirteen million, five hundred twenty-one thousand, four hundred twenty-six".