145273381 has 16 divisors (see below), whose sum is σ = 171383040. Its totient is φ = 121646080.

The previous prime is 145273351. The next prime is 145273397. The reversal of 145273381 is 183372541.

It is a cyclic number.

It is not a de Polignac number, because 145273381 - 2⁷ = 145273253 is a prime.

It is a super-2 number, since 2×145273381² = 42208710454342322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145273351) 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 15 ways as a sum of consecutive naturals, for example, 525 + ... + 17053.

It is an arithmetic number, because the mean of its divisors is an integer number (10711440).

Almost surely, 2^145273381 is an apocalyptic number.

145273381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145273381 is a deficient number, since it is larger than the sum of its proper divisors (26109659).

145273381 is a wasteful number, since it uses less digits than its factorization.

145273381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16604.

The product of its digits is 20160, while the sum is 34.

The square root of 145273381 is about 12052.9407614905. The cubic root of 145273381 is about 525.6887480386.

The spelling of 145273381 in words is "one hundred forty-five million, two hundred seventy-three thousand, three hundred eighty-one".