145972159 has 4 divisors (see below), whose sum is σ = 146005560. Its totient is φ = 145938760.

The previous prime is 145972133. The next prime is 145972181. The reversal of 145972159 is 951279541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 951279541 = 107 ⋅8890463.

It is a cyclic number.

It is not a de Polignac number, because 145972159 - 2²¹ = 143875007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145972129) 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, 8944 + ... + 19285.

It is an arithmetic number, because the mean of its divisors is an integer number (36501390).

Almost surely, 2^145972159 is an apocalyptic number.

145972159 is a deficient number, since it is larger than the sum of its proper divisors (33401).

145972159 is an equidigital number, since it uses as much as digits as its factorization.

145972159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33400.

The product of its digits is 113400, while the sum is 43.

The square root of 145972159 is about 12081.8938498896. The cubic root of 145972159 is about 526.5302702301.

The spelling of 145972159 in words is "one hundred forty-five million, nine hundred seventy-two thousand, one hundred fifty-nine".