1142400243 has 4 divisors (see below), whose sum is σ = 1523200328. Its totient is φ = 761600160.

The previous prime is 1142400239. The next prime is 1142400293. The reversal of 1142400243 is 3420042411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1142400243 - 2² = 1142400239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142400293) 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, 190400038 + ... + 190400043.

It is an arithmetic number, because the mean of its divisors is an integer number (380800082).

Almost surely, 2^1142400243 is an apocalyptic number.

1142400243 is a deficient number, since it is larger than the sum of its proper divisors (380800085).

1142400243 is an equidigital number, since it uses as much as digits as its factorization.

1142400243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380800084.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1142400243 is about 33799.4118735815. The cubic root of 1142400243 is about 1045.3765705568.

Adding to 1142400243 its reverse (3420042411), we get a palindrome (4562442654).

The spelling of 1142400243 in words is "one billion, one hundred forty-two million, four hundred thousand, two hundred forty-three".