1341553561 has 4 divisors (see below), whose sum is σ = 1341873252. Its totient is φ = 1341233872.

The previous prime is 1341553537. The next prime is 1341553583. The reversal of 1341553561 is 1653551431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653551431 = 7 ⋅236221633.

It can be written as a sum of positive squares in 2 ways, for example, as 63920025 + 1277633536 = 7995^2 + 35744^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1341553561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1341557561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153466 + ... + 161971.

It is an arithmetic number, because the mean of its divisors is an integer number (335468313).

Almost surely, 2^1341553561 is an apocalyptic number.

It is an amenable number.

1341553561 is a deficient number, since it is larger than the sum of its proper divisors (319691).

1341553561 is an equidigital number, since it uses as much as digits as its factorization.

1341553561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319690.

The product of its digits is 27000, while the sum is 34.

The square root of 1341553561 is about 36627.2243147089. The cubic root of 1341553561 is about 1102.8996666664.

The spelling of 1341553561 in words is "one billion, three hundred forty-one million, five hundred fifty-three thousand, five hundred sixty-one".