1361434121 has 4 divisors (see below), whose sum is σ = 1374652032. Its totient is φ = 1348216212.

The previous prime is 1361434093. The next prime is 1361434141. The reversal of 1361434121 is 1214341631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1214341631 = 33923 ⋅35797.

It is a cyclic number.

It is not a de Polignac number, because 1361434121 - 2¹⁴ = 1361417737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1361434141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6608801 + ... + 6609006.

It is an arithmetic number, because the mean of its divisors is an integer number (343663008).

Almost surely, 2^1361434121 is an apocalyptic number.

It is an amenable number.

1361434121 is a deficient number, since it is larger than the sum of its proper divisors (13217911).

1361434121 is a wasteful number, since it uses less digits than its factorization.

1361434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13217910.

The product of its digits is 1728, while the sum is 26.

The square root of 1361434121 is about 36897.6167387543. The cubic root of 1361434121 is about 1108.3209527904.

Adding to 1361434121 its reverse (1214341631), we get a palindrome (2575775752).

The spelling of 1361434121 in words is "one billion, three hundred sixty-one million, four hundred thirty-four thousand, one hundred twenty-one".