13126431 has 8 divisors (see below), whose sum is σ = 18531504. Its totient is φ = 8236160.

The previous prime is 13126429. The next prime is 13126447. The reversal of 13126431 is 13462131.

13126431 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13126431 - 2¹ = 13126429 is a prime.

It is a super-2 number, since 2×13126431² = 344606381595522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13126398 and 13126407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13126831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128640 + ... + 128741.

It is an arithmetic number, because the mean of its divisors is an integer number (2316438).

Almost surely, 2^13126431 is an apocalyptic number.

13126431 is a deficient number, since it is larger than the sum of its proper divisors (5405073).

13126431 is a wasteful number, since it uses less digits than its factorization.

13126431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257401.

The product of its digits is 432, while the sum is 21.

The square root of 13126431 is about 3623.0416779275. The cubic root of 13126431 is about 235.8932714282.

Adding to 13126431 its reverse (13462131), we get a palindrome (26588562).

It can be divided in two parts, 131 and 26431, that added together give a palindrome (26562).

The spelling of 13126431 in words is "thirteen million, one hundred twenty-six thousand, four hundred thirty-one".