145509806 has 16 divisors (see below), whose sum is σ = 236090400. Its totient is φ = 66862368.

The previous prime is 145509803. The next prime is 145509853. The reversal of 145509806 is 608905541.

145509806 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 145509806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145509803) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6266 + ... + 18173.

It is an arithmetic number, because the mean of its divisors is an integer number (14755650).

Almost surely, 2^145509806 is an apocalyptic number.

145509806 is a deficient number, since it is larger than the sum of its proper divisors (90580594).

145509806 is a wasteful number, since it uses less digits than its factorization.

145509806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24683.

The product of its (nonzero) digits is 43200, while the sum is 38.

The square root of 145509806 is about 12062.7445467439. The cubic root of 145509806 is about 525.9737706612.

The spelling of 145509806 in words is "one hundred forty-five million, five hundred nine thousand, eight hundred six".