13413121 has 2 divisors, whose sum is σ = 13413122. Its totient is φ = 13413120.

The previous prime is 13413089. The next prime is 13413131. The reversal of 13413121 is 12131431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8850625 + 4562496 = 2975^2 + 2136^2 .

It is a cyclic number.

It is not a de Polignac number, because 13413121 - 2⁵ = 13413089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13413095 and 13413104.

It is not a weakly prime, because it can be changed into another prime (13413131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6706560 + 6706561.

It is an arithmetic number, because the mean of its divisors is an integer number (6706561).

Almost surely, 2^13413121 is an apocalyptic number.

It is an amenable number.

13413121 is a deficient number, since it is larger than the sum of its proper divisors (1).

13413121 is an equidigital number, since it uses as much as digits as its factorization.

13413121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72, while the sum is 16.

The square root of 13413121 is about 3662.3927970659. The cubic root of 13413121 is about 237.5982736425.

Adding to 13413121 its reverse (12131431), we get a palindrome (25544552).

It can be divided in two parts, 134131 and 21, that multiplied together give a triangular number (2816751 = T₂₃₇₃).

The spelling of 13413121 in words is "thirteen million, four hundred thirteen thousand, one hundred twenty-one".