1142400043 has 4 divisors (see below), whose sum is σ = 1142592448. Its totient is φ = 1142207640.

The previous prime is 1142400037. The next prime is 1142400071. The reversal of 1142400043 is 3400042411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3400042411 = 58193 ⋅58427.

It is a cyclic number.

It is not a de Polignac number, because 1142400043 - 2¹³ = 1142391851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1142400943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87003 + ... + 99268.

It is an arithmetic number, because the mean of its divisors is an integer number (285648112).

Almost surely, 2^1142400043 is an apocalyptic number.

1142400043 is a deficient number, since it is larger than the sum of its proper divisors (192405).

1142400043 is an equidigital number, since it uses as much as digits as its factorization.

1142400043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192404.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1142400043 is about 33799.4089149500. The cubic root of 1142400043 is about 1045.3765095521.

Adding to 1142400043 its reverse (3400042411), we get a palindrome (4542442454).

The spelling of 1142400043 in words is "one billion, one hundred forty-two million, four hundred thousand, forty-three".