1345301121561 has 8 divisors (see below), whose sum is σ = 1793742028320. Its totient is φ = 896863814592.

The previous prime is 1345301121481. The next prime is 1345301121589. The reversal of 1345301121561 is 1651211035431.

It is a happy number.

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

It is not a de Polignac number, because 1345301121561 - 2³¹ = 1343153637913 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1345301121061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145585 + ... + 1646753.

It is an arithmetic number, because the mean of its divisors is an integer number (224217753540).

Almost surely, 2^{1345301121561} is an apocalyptic number.

It is an amenable number.

1345301121561 is a deficient number, since it is larger than the sum of its proper divisors (448440906759).

1345301121561 is a wasteful number, since it uses less digits than its factorization.

1345301121561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799895.

The product of its (nonzero) digits is 10800, while the sum is 33.

Adding to 1345301121561 its reverse (1651211035431), we get a palindrome (2996512156992).

The spelling of 1345301121561 in words is "one trillion, three hundred forty-five billion, three hundred one million, one hundred twenty-one thousand, five hundred sixty-one".