142836431 has 16 divisors (see below), whose sum is σ = 157417344. Its totient is φ = 129053184.

The previous prime is 142836413. The next prime is 142836457. The reversal of 142836431 is 134638241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142836431 is a prime.

It is a super-2 number, since 2×142836431² = 40804492041635522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142836401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40661 + ... + 44033.

It is an arithmetic number, because the mean of its divisors is an integer number (9838584).

Almost surely, 2^142836431 is an apocalyptic number.

142836431 is a deficient number, since it is larger than the sum of its proper divisors (14580913).

142836431 is a wasteful number, since it uses less digits than its factorization.

142836431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3490.

The product of its digits is 13824, while the sum is 32.

The square root of 142836431 is about 11951.4196227896. The cubic root of 142836431 is about 522.7326936813.

The spelling of 142836431 in words is "one hundred forty-two million, eight hundred thirty-six thousand, four hundred thirty-one".