145765447 has 4 divisors (see below), whose sum is σ = 145791016. Its totient is φ = 145739880.

The previous prime is 145765439. The next prime is 145765457. The reversal of 145765447 is 744567541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744567541 = 12641 ⋅58901.

It is a cyclic number.

It is not a de Polignac number, because 145765447 - 2³ = 145765439 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 (145765457) 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 3 ways as a sum of consecutive naturals, for example, 88 + ... + 17074.

It is an arithmetic number, because the mean of its divisors is an integer number (36447754).

Almost surely, 2^145765447 is an apocalyptic number.

145765447 is a deficient number, since it is larger than the sum of its proper divisors (25569).

145765447 is an equidigital number, since it uses as much as digits as its factorization.

145765447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25568.

The product of its digits is 470400, while the sum is 43.

The square root of 145765447 is about 12073.3362000733. The cubic root of 145765447 is about 526.2816119864.

The spelling of 145765447 in words is "one hundred forty-five million, seven hundred sixty-five thousand, four hundred forty-seven".