145683941 has 4 divisors (see below), whose sum is σ = 156890412. Its totient is φ = 134477472.

The previous prime is 145683917. The next prime is 145683943. The reversal of 145683941 is 149386541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 149386541 = 23 ⋅6495067.

It can be written as a sum of positive squares in 2 ways, for example, as 18671041 + 127012900 = 4321^2 + 11270^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145683941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145683943) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5603216 + ... + 5603241.

It is an arithmetic number, because the mean of its divisors is an integer number (39222603).

Almost surely, 2^145683941 is an apocalyptic number.

It is an amenable number.

145683941 is a deficient number, since it is larger than the sum of its proper divisors (11206471).

145683941 is a wasteful number, since it uses less digits than its factorization.

145683941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11206470.

The product of its digits is 103680, while the sum is 41.

The square root of 145683941 is about 12069.9602733398. The cubic root of 145683941 is about 526.1835020720.

The spelling of 145683941 in words is "one hundred forty-five million, six hundred eighty-three thousand, nine hundred forty-one".