145365381 has 24 divisors (see below), whose sum is σ = 246402240. Its totient is φ = 82971216.

The previous prime is 145365373. The next prime is 145365427. The reversal of 145365381 is 183563541.

It is not a de Polignac number, because 145365381 - 2³ = 145365373 is a prime.

It is a super-2 number, since 2×145365381² = 42262187986550322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145365301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 165315 + ... + 166191.

It is an arithmetic number, because the mean of its divisors is an integer number (10266760).

Almost surely, 2^145365381 is an apocalyptic number.

It is an amenable number.

145365381 is a deficient number, since it is larger than the sum of its proper divisors (101036859).

145365381 is an frugal number, since it uses more digits than its factorization.

145365381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 887 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 145365381 is about 12056.7566534288. The cubic root of 145365381 is about 525.7996955473.

The spelling of 145365381 in words is "one hundred forty-five million, three hundred sixty-five thousand, three hundred eighty-one".