145494805 has 8 divisors (see below), whose sum is σ = 177888312. Its totient is φ = 114199488.

The previous prime is 145494793. The next prime is 145494847. The reversal of 145494805 is 508494541.

It can be written as a sum of positive squares in 4 ways, for example, as 68459076 + 77035729 = 8274^2 + 8777^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145494805 - 2⁷ = 145494677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 274254 + ... + 274783.

It is an arithmetic number, because the mean of its divisors is an integer number (22236039).

Almost surely, 2^145494805 is an apocalyptic number.

It is an amenable number.

145494805 is a deficient number, since it is larger than the sum of its proper divisors (32393507).

145494805 is an equidigital number, since it uses as much as digits as its factorization.

145494805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549095.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 145494805 is about 12062.1227402145. The cubic root of 145494805 is about 525.9556953532.

The spelling of 145494805 in words is "one hundred forty-five million, four hundred ninety-four thousand, eight hundred five".