1243055943 has 32 divisors (see below), whose sum is σ = 1941139200. Its totient is φ = 784015200.

The previous prime is 1243055941. The next prime is 1243056043. The reversal of 1243055943 is 3495503421.

It is not a de Polignac number, because 1243055943 - 2¹ = 1243055941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243055898 and 1243055907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243055941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558573 + ... + 560793.

It is an arithmetic number, because the mean of its divisors is an integer number (60660600).

Almost surely, 2^1243055943 is an apocalyptic number.

1243055943 is a deficient number, since it is larger than the sum of its proper divisors (698083257).

1243055943 is a wasteful number, since it uses less digits than its factorization.

1243055943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340 (or 3334 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1243055943 is about 35256.9984967524. The cubic root of 1243055943 is about 1075.2189041862.

The spelling of 1243055943 in words is "one billion, two hundred forty-three million, fifty-five thousand, nine hundred forty-three".