145805741 has 4 divisors (see below), whose sum is σ = 150509184. Its totient is φ = 141102300.

The previous prime is 145805731. The next prime is 145805749. The reversal of 145805741 is 147508541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 147508541 = 17 ⋅8676973.

It is a cyclic number.

It is not a de Polignac number, because 145805741 - 2¹⁸ = 145543597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145805749) 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 3 ways as a sum of consecutive naturals, for example, 2351675 + ... + 2351736.

It is an arithmetic number, because the mean of its divisors is an integer number (37627296).

Almost surely, 2^145805741 is an apocalyptic number.

It is an amenable number.

145805741 is a deficient number, since it is larger than the sum of its proper divisors (4703443).

145805741 is an equidigital number, since it uses as much as digits as its factorization.

145805741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703442.

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 145805741 is about 12075.0048033117. The cubic root of 145805741 is about 526.3301009300.

The spelling of 145805741 in words is "one hundred forty-five million, eight hundred five thousand, seven hundred forty-one".