142457617 has 4 divisors (see below), whose sum is σ = 147053056. Its totient is φ = 137862180.

The previous prime is 142457597. The next prime is 142457621. The reversal of 142457617 is 716754241.

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 a cyclic number.

It is not a de Polignac number, because 142457617 - 2²³ = 134069009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142457017) 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, 2297673 + ... + 2297734.

It is an arithmetic number, because the mean of its divisors is an integer number (36763264).

Almost surely, 2^142457617 is an apocalyptic number.

It is an amenable number.

142457617 is a deficient number, since it is larger than the sum of its proper divisors (4595439).

142457617 is an equidigital number, since it uses as much as digits as its factorization.

142457617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595438.

The product of its digits is 47040, while the sum is 37.

The square root of 142457617 is about 11935.5610257750. The cubic root of 142457617 is about 522.2701744828.

The spelling of 142457617 in words is "one hundred forty-two million, four hundred fifty-seven thousand, six hundred seventeen".