142393431 has 16 divisors (see below), whose sum is σ = 191465984. Its totient is φ = 94129344.

The previous prime is 142393357. The next prime is 142393439. The reversal of 142393431 is 134393241.

It is not a de Polignac number, because 142393431 - 2⁹ = 142392919 is a prime.

It is a super-4 number, since 4×142393431⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142393439) 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 15 ways as a sum of consecutive naturals, for example, 311355 + ... + 311811.

It is an arithmetic number, because the mean of its divisors is an integer number (11966624).

Almost surely, 2^142393431 is an apocalyptic number.

142393431 is a deficient number, since it is larger than the sum of its proper divisors (49072553).

142393431 is a wasteful number, since it uses less digits than its factorization.

142393431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110.

The product of its digits is 7776, while the sum is 30.

The square root of 142393431 is about 11932.8718672413. The cubic root of 142393431 is about 522.1917243209.

The spelling of 142393431 in words is "one hundred forty-two million, three hundred ninety-three thousand, four hundred thirty-one".