145374381 has 6 divisors (see below), whose sum is σ = 209985230. Its totient is φ = 96916248.

The previous prime is 145374371. The next prime is 145374409. The reversal of 145374381 is 183473541.

It is a happy number.

145374381 is a `hidden beast` number, since 1 + 4 + 537 + 43 + 81 = 666.

145374381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 142922025 + 2452356 = 11955^2 + 1566^2 .

It is not a de Polignac number, because 145374381 - 2⁵ = 145374349 is a prime.

It is a super-2 number, since 2×145374381² = 42267421302266322, 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 (145374331) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8076346 + ... + 8076363.

Almost surely, 2^145374381 is an apocalyptic number.

It is an amenable number.

145374381 is a deficient number, since it is larger than the sum of its proper divisors (64610849).

145374381 is a wasteful number, since it uses less digits than its factorization.

145374381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16152715 (or 16152712 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 145374381 is about 12057.1298823559. The cubic root of 145374381 is about 525.8105465940.

The spelling of 145374381 in words is "one hundred forty-five million, three hundred seventy-four thousand, three hundred eighty-one".