134142431 has 4 divisors (see below), whose sum is σ = 134463000. Its totient is φ = 133821864.

The previous prime is 134142419. The next prime is 134142433. The reversal of 134142431 is 134241431.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134142431 is a prime.

It is a super-2 number, since 2×134142431² = 35988383589179522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134142397 and 134142406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134142433) 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, 159656 + ... + 160493.

It is an arithmetic number, because the mean of its divisors is an integer number (33615750).

Almost surely, 2^134142431 is an apocalyptic number.

134142431 is a deficient number, since it is larger than the sum of its proper divisors (320569).

134142431 is an equidigital number, since it uses as much as digits as its factorization.

134142431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320568.

The product of its digits is 1152, while the sum is 23.

The square root of 134142431 is about 11581.9873510551. The cubic root of 134142431 is about 511.9042370032.

Adding to 134142431 its reverse (134241431), we get a palindrome (268383862).

The spelling of 134142431 in words is "one hundred thirty-four million, one hundred forty-two thousand, four hundred thirty-one".