1243466671 has 4 divisors (see below), whose sum is σ = 1244431144. Its totient is φ = 1242502200.

The previous prime is 1243466657. The next prime is 1243466759. The reversal of 1243466671 is 1766643421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1766643421 = 2689 ⋅656989.

It is a cyclic number.

It is not a de Polignac number, because 1243466671 - 2¹¹ = 1243464623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243466771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 480300 + ... + 482881.

It is an arithmetic number, because the mean of its divisors is an integer number (311107786).

Almost surely, 2^1243466671 is an apocalyptic number.

1243466671 is a deficient number, since it is larger than the sum of its proper divisors (964473).

1243466671 is an equidigital number, since it uses as much as digits as its factorization.

1243466671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964472.

The product of its digits is 145152, while the sum is 40.

The square root of 1243466671 is about 35262.8227883135. The cubic root of 1243466671 is about 1075.3373150219.

The spelling of 1243466671 in words is "one billion, two hundred forty-three million, four hundred sixty-six thousand, six hundred seventy-one".