142189043 has 4 divisors (see below), whose sum is σ = 143902248. Its totient is φ = 140475840.

The previous prime is 142189009. The next prime is 142189057. The reversal of 142189043 is 340981241.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340981241 = 251 ⋅1358491.

It is not a de Polignac number, because 142189043 - 2⁶ = 142188979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142189063) 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, 856478 + ... + 856643.

It is an arithmetic number, because the mean of its divisors is an integer number (35975562).

Almost surely, 2^142189043 is an apocalyptic number.

142189043 is a deficient number, since it is larger than the sum of its proper divisors (1713205).

142189043 is an equidigital number, since it uses as much as digits as its factorization.

142189043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1713204.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 142189043 is about 11924.3047176764. The cubic root of 142189043 is about 521.9417576666.

The spelling of 142189043 in words is "one hundred forty-two million, one hundred eighty-nine thousand, forty-three".