1243460643 has 8 divisors (see below), whose sum is σ = 1745208000. Its totient is φ = 785343528.

The previous prime is 1243460633. The next prime is 1243460677. The reversal of 1243460643 is 3460643421.

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

It is not a de Polignac number, because 1243460643 - 2⁹ = 1243460131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1243460633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10907493 + ... + 10907606.

It is an arithmetic number, because the mean of its divisors is an integer number (218151000).

Almost surely, 2^1243460643 is an apocalyptic number.

1243460643 is a deficient number, since it is larger than the sum of its proper divisors (501747357).

1243460643 is a wasteful number, since it uses less digits than its factorization.

1243460643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21815121.

The product of its (nonzero) digits is 41472, while the sum is 33.

The square root of 1243460643 is about 35262.7373157558. The cubic root of 1243460643 is about 1075.3355773681.

The spelling of 1243460643 in words is "one billion, two hundred forty-three million, four hundred sixty thousand, six hundred forty-three".