12543001535 has 4 divisors (see below), whose sum is σ = 15051601848. Its totient is φ = 10034401224.

The previous prime is 12543001507. The next prime is 12543001567. The reversal of 12543001535 is 53510034521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53510034521 = 3769 ⋅14197409.

It is a cyclic number.

It is not a de Polignac number, because 12543001535 - 2⁸ = 12543001279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12543001498 and 12543001507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1254300149 + ... + 1254300158.

It is an arithmetic number, because the mean of its divisors is an integer number (3762900462).

Almost surely, 2^12543001535 is an apocalyptic number.

12543001535 is a deficient number, since it is larger than the sum of its proper divisors (2508600313).

12543001535 is an equidigital number, since it uses as much as digits as its factorization.

12543001535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508600312.

The product of its (nonzero) digits is 9000, while the sum is 29.

The spelling of 12543001535 in words is "twelve billion, five hundred forty-three million, one thousand, five hundred thirty-five".