1043400243 has 8 divisors (see below), whose sum is σ = 1391360256. Its totient is φ = 695520200.

The previous prime is 1043400233. The next prime is 1043400247. The reversal of 1043400243 is 3420043401.

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 1043400243 - 2⁴ = 1043400227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1043400247) 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, 24778 + ... + 51968.

It is an arithmetic number, because the mean of its divisors is an integer number (173920032).

Almost surely, 2^1043400243 is an apocalyptic number.

1043400243 is a deficient number, since it is larger than the sum of its proper divisors (347960013).

1043400243 is a wasteful number, since it uses less digits than its factorization.

1043400243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39985.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1043400243 is about 32301.7065029079. The cubic root of 1043400243 is about 1014.2623655360.

Adding to 1043400243 its reverse (3420043401), we get a palindrome (4463443644).

The spelling of 1043400243 in words is "one billion, forty-three million, four hundred thousand, two hundred forty-three".