1243745043 has 8 divisors (see below), whose sum is σ = 1685512656. Its totient is φ = 815570400.

The previous prime is 1243745039. The next prime is 1243745081. The reversal of 1243745043 is 3405473421.

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

It is not a de Polignac number, because 1243745043 - 2² = 1243745039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1243744995 and 1243745013.

It is not an unprimeable number, because it can be changed into a prime (1243745843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3398028 + ... + 3398393.

It is an arithmetic number, because the mean of its divisors is an integer number (210689082).

Almost surely, 2^1243745043 is an apocalyptic number.

1243745043 is a deficient number, since it is larger than the sum of its proper divisors (441767613).

1243745043 is an equidigital number, since it uses as much as digits as its factorization.

1243745043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6796485.

The product of its (nonzero) digits is 40320, while the sum is 33.

The square root of 1243745043 is about 35266.7696706120. The cubic root of 1243745043 is about 1075.4175534583.

The spelling of 1243745043 in words is "one billion, two hundred forty-three million, seven hundred forty-five thousand, forty-three".