142471137 has 4 divisors (see below), whose sum is σ = 189961520. Its totient is φ = 94980756.

The previous prime is 142471129. The next prime is 142471141. The reversal of 142471137 is 731174241.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 142471137 - 2³ = 142471129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142471117) 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, 23745187 + ... + 23745192.

It is an arithmetic number, because the mean of its divisors is an integer number (47490380).

Almost surely, 2^142471137 is an apocalyptic number.

It is an amenable number.

142471137 is a deficient number, since it is larger than the sum of its proper divisors (47490383).

142471137 is an equidigital number, since it uses as much as digits as its factorization.

142471137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47490382.

The product of its digits is 4704, while the sum is 30.

The square root of 142471137 is about 11936.1273870548. The cubic root of 142471137 is about 522.2866960502.

The spelling of 142471137 in words is "one hundred forty-two million, four hundred seventy-one thousand, one hundred thirty-seven".