142315897 has 4 divisors (see below), whose sum is σ = 143168256. Its totient is φ = 141463540.

The previous prime is 142315883. The next prime is 142315903. The reversal of 142315897 is 798513241.

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 a de Polignac number, because none of the positive numbers 2^k-142315897 is a prime.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (142315807) 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, 425929 + ... + 426262.

It is an arithmetic number, because the mean of its divisors is an integer number (35792064).

Almost surely, 2^142315897 is an apocalyptic number.

It is an amenable number.

142315897 is a deficient number, since it is larger than the sum of its proper divisors (852359).

142315897 is an equidigital number, since it uses as much as digits as its factorization.

142315897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852358.

The product of its digits is 60480, while the sum is 40.

The square root of 142315897 is about 11929.6226679640. The cubic root of 142315897 is about 522.0969283656.

The spelling of 142315897 in words is "one hundred forty-two million, three hundred fifteen thousand, eight hundred ninety-seven".