145865121 has 8 divisors (see below), whose sum is σ = 194640864. Its totient is φ = 97166400.

The previous prime is 145865101. The next prime is 145865129. The reversal of 145865121 is 121568541.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 145865121 - 2⁷ = 145864993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145865129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14680 + ... + 22521.

It is an arithmetic number, because the mean of its divisors is an integer number (24330108).

Almost surely, 2^145865121 is an apocalyptic number.

It is an amenable number.

145865121 is a deficient number, since it is larger than the sum of its proper divisors (48775743).

145865121 is a wasteful number, since it uses less digits than its factorization.

145865121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38511.

The product of its digits is 9600, while the sum is 33.

The square root of 145865121 is about 12077.4633512174. The cubic root of 145865121 is about 526.4015412803.

The spelling of 145865121 in words is "one hundred forty-five million, eight hundred sixty-five thousand, one hundred twenty-one".