145431142 has 4 divisors (see below), whose sum is σ = 218146716. Its totient is φ = 72715570.

The previous prime is 145431131. The next prime is 145431161. The reversal of 145431142 is 241134541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241134541 = 67 ⋅3599023.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 36357784 + ... + 36357787.

It is an arithmetic number, because the mean of its divisors is an integer number (54536679).

Almost surely, 2^145431142 is an apocalyptic number.

145431142 is a deficient number, since it is larger than the sum of its proper divisors (72715574).

145431142 is an equidigital number, since it uses as much as digits as its factorization.

145431142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72715573.

The product of its digits is 1920, while the sum is 25.

The square root of 145431142 is about 12059.4834881101. The cubic root of 145431142 is about 525.8789714171.

Adding to 145431142 its reverse (241134541), we get a palindrome (386565683).

The spelling of 145431142 in words is "one hundred forty-five million, four hundred thirty-one thousand, one hundred forty-two".