13478261 has 2 divisors, whose sum is σ = 13478262. Its totient is φ = 13478260.

The previous prime is 13478251. The next prime is 13478281. The reversal of 13478261 is 16287431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9891025 + 3587236 = 3145^2 + 1894^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478261 - 2¹⁰ = 13477237 is a prime.

It is equal to p₈₇₈₃₂₄ and since 13478261 and 878324 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13478251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739130 + 6739131.

It is an arithmetic number, because the mean of its divisors is an integer number (6739131).

Almost surely, 2^13478261 is an apocalyptic number.

It is an amenable number.

13478261 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478261 is an equidigital number, since it uses as much as digits as its factorization.

13478261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 13478261 is about 3671.2751190833. The cubic root of 13478261 is about 237.9822798284.

The spelling of 13478261 in words is "thirteen million, four hundred seventy-eight thousand, two hundred sixty-one".