1264612543 has 8 divisors (see below), whose sum is σ = 1307710976. Its totient is φ = 1221658200.

The previous prime is 1264612537. The next prime is 1264612577. The reversal of 1264612543 is 3452164621.

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

It is a cyclic number.

It is not a de Polignac number, because 1264612543 - 2⁵ = 1264612511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1264612499 and 1264612508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264612043) 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, 18021 + ... + 53422.

It is an arithmetic number, because the mean of its divisors is an integer number (163463872).

Almost surely, 2^1264612543 is an apocalyptic number.

1264612543 is a deficient number, since it is larger than the sum of its proper divisors (43098433).

1264612543 is an equidigital number, since it uses as much as digits as its factorization.

1264612543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72045.

The product of its digits is 34560, while the sum is 34.

The square root of 1264612543 is about 35561.3911848229. The cubic root of 1264612543 is about 1081.3986631191.

The spelling of 1264612543 in words is "one billion, two hundred sixty-four million, six hundred twelve thousand, five hundred forty-three".