13140261 has 6 divisors (see below), whose sum is σ = 18980390. Its totient is φ = 8760168.

The previous prime is 13140221. The next prime is 13140271. The reversal of 13140261 is 16204131.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12383361 + 756900 = 3519^2 + 870^2 .

It is not a de Polignac number, because 13140261 - 2¹⁰ = 13139237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13140221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 730006 + ... + 730023.

Almost surely, 2^13140261 is an apocalyptic number.

It is an amenable number.

13140261 is a deficient number, since it is larger than the sum of its proper divisors (5840129).

13140261 is a wasteful number, since it uses less digits than its factorization.

13140261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1460035 (or 1460032 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13140261 is about 3624.9497927558. The cubic root of 13140261 is about 235.9760880206.

Adding to 13140261 its reverse (16204131), we get a palindrome (29344392).

The spelling of 13140261 in words is "thirteen million, one hundred forty thousand, two hundred sixty-one".