145505806 has 16 divisors (see below), whose sum is σ = 222871824. Its totient is φ = 71231104.

The previous prime is 145505779. The next prime is 145505813. The reversal of 145505806 is 608505541.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 14880 + ... + 22636.

It is an arithmetic number, because the mean of its divisors is an integer number (13929489).

Almost surely, 2^145505806 is an apocalyptic number.

145505806 is a deficient number, since it is larger than the sum of its proper divisors (77366018).

145505806 is a wasteful number, since it uses less digits than its factorization.

145505806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7955.

The product of its (nonzero) digits is 24000, while the sum is 34.

The square root of 145505806 is about 12062.5787458570. The cubic root of 145505806 is about 525.9689510219.

The spelling of 145505806 in words is "one hundred forty-five million, five hundred five thousand, eight hundred six".