145972158 has 16 divisors (see below), whose sum is σ = 292309776. Its totient is φ = 48596480.

The previous prime is 145972133. The next prime is 145972181. The reversal of 145972158 is 851279541.

It is a super-2 number, since 2×145972158² = 42615741822353928, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9891 + ... + 19742.

It is an arithmetic number, because the mean of its divisors is an integer number (18269361).

Almost surely, 2^145972158 is an apocalyptic number.

145972158 is an abundant number, since it is smaller than the sum of its proper divisors (146337618).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145972158 is a wasteful number, since it uses less digits than its factorization.

145972158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30459.

The product of its digits is 100800, while the sum is 42.

The square root of 145972158 is about 12081.8938085054. The cubic root of 145972158 is about 526.5302690278.

The spelling of 145972158 in words is "one hundred forty-five million, nine hundred seventy-two thousand, one hundred fifty-eight".