142823137 has 4 divisors (see below), whose sum is σ = 151224516. Its totient is φ = 134421760.

The previous prime is 142823117. The next prime is 142823147. The reversal of 142823137 is 731328241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 731328241 = 7 ⋅104475463.

It can be written as a sum of positive squares in 2 ways, for example, as 58844241 + 83978896 = 7671^2 + 9164^2 .

It is a cyclic number.

It is not a de Polignac number, because 142823137 - 2²³ = 134434529 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142823099 and 142823108.

It is not an unprimeable number, because it can be changed into a prime (142823117) 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, 4200664 + ... + 4200697.

It is an arithmetic number, because the mean of its divisors is an integer number (37806129).

Almost surely, 2^142823137 is an apocalyptic number.

142823137 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

142823137 is a deficient number, since it is larger than the sum of its proper divisors (8401379).

142823137 is an equidigital number, since it uses as much as digits as its factorization.

142823137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8401378.

The product of its digits is 8064, while the sum is 31.

The square root of 142823137 is about 11950.8634416096. The cubic root of 142823137 is about 522.7164760073.

The spelling of 142823137 in words is "one hundred forty-two million, eight hundred twenty-three thousand, one hundred thirty-seven".