1287530141 has 4 divisors (see below), whose sum is σ = 1287627072. Its totient is φ = 1287433212.

The previous prime is 1287530077. The next prime is 1287530143. The reversal of 1287530141 is 1410357821.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1410357821 = 19 ⋅74229359.

It is a cyclic number.

It is not a de Polignac number, because 1287530141 - 2⁶ = 1287530077 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1287530098 and 1287530107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287530143) 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 3 ways as a sum of consecutive naturals, for example, 24635 + ... + 56408.

It is an arithmetic number, because the mean of its divisors is an integer number (321906768).

Almost surely, 2^1287530141 is an apocalyptic number.

It is an amenable number.

1287530141 is a deficient number, since it is larger than the sum of its proper divisors (96931).

1287530141 is an equidigital number, since it uses as much as digits as its factorization.

1287530141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96930.

The product of its (nonzero) digits is 6720, while the sum is 32.

The square root of 1287530141 is about 35882.1702381559. The cubic root of 1287530141 is about 1087.8920461864.

Adding to 1287530141 its reverse (1410357821), we get a palindrome (2697887962).

The spelling of 1287530141 in words is "one billion, two hundred eighty-seven million, five hundred thirty thousand, one hundred forty-one".