145766641 has 4 divisors (see below), whose sum is σ = 145975284. Its totient is φ = 145558000.

The previous prime is 145766627. The next prime is 145766669. The reversal of 145766641 is 146667541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 146667541 = 31 ⋅4731211.

It can be written as a sum of positive squares in 2 ways, for example, as 123676641 + 22090000 = 11121^2 + 4700^2 .

It is a cyclic number.

It is not a de Polignac number, because 145766641 - 2⁵ = 145766609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 145766594 and 145766603.

It is not an unprimeable number, because it can be changed into a prime (145766671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103270 + ... + 104671.

It is an arithmetic number, because the mean of its divisors is an integer number (36493821).

Almost surely, 2^145766641 is an apocalyptic number.

It is an amenable number.

145766641 is a deficient number, since it is larger than the sum of its proper divisors (208643).

145766641 is an equidigital number, since it uses as much as digits as its factorization.

145766641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208642.

The product of its digits is 120960, while the sum is 40.

The square root of 145766641 is about 12073.3856477792. The cubic root of 145766641 is about 526.2830489491.

The spelling of 145766641 in words is "one hundred forty-five million, seven hundred sixty-six thousand, six hundred forty-one".