159897145 has 4 divisors (see below), whose sum is σ = 191876580. Its totient is φ = 127917712.

The previous prime is 159897137. The next prime is 159897167. The reversal of 159897145 is 541798951.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541798951 = 14057 ⋅38543.

It can be written as a sum of positive squares in 2 ways, for example, as 103286569 + 56610576 = 10163^2 + 7524^2 .

It is a cyclic number.

It is not a de Polignac number, because 159897145 - 2³ = 159897137 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15989710 + ... + 15989719.

It is an arithmetic number, because the mean of its divisors is an integer number (47969145).

Almost surely, 2^159897145 is an apocalyptic number.

It is an amenable number.

159897145 is a deficient number, since it is larger than the sum of its proper divisors (31979435).

159897145 is an equidigital number, since it uses as much as digits as its factorization.

159897145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31979434.

The product of its digits is 453600, while the sum is 49.

The square root of 159897145 is about 12645.0442862016. The cubic root of 159897145 is about 542.7671686228.

The spelling of 159897145 in words is "one hundred fifty-nine million, eight hundred ninety-seven thousand, one hundred forty-five".