1341254531521 has 4 divisors (see below), whose sum is σ = 1341555063552. Its totient is φ = 1340953999492.

The previous prime is 1341254531503. The next prime is 1341254531549. The reversal of 1341254531521 is 1251354521431.

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.

It is a cyclic number.

It is not a de Polignac number, because 1341254531521 - 2¹¹ = 1341254529473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1341254531581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150259321 + ... + 150268246.

It is an arithmetic number, because the mean of its divisors is an integer number (335388765888).

Almost surely, 2^{1341254531521} is an apocalyptic number.

It is an amenable number.

1341254531521 is a deficient number, since it is larger than the sum of its proper divisors (300532031).

1341254531521 is an equidigital number, since it uses as much as digits as its factorization.

1341254531521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300532030.

The product of its digits is 72000, while the sum is 37.

The spelling of 1341254531521 in words is "one trillion, three hundred forty-one billion, two hundred fifty-four million, five hundred thirty-one thousand, five hundred twenty-one".