145044805 has 24 divisors (see below), whose sum is σ = 184681080. Its totient is φ = 109226880.

The previous prime is 145044793. The next prime is 145044857. The reversal of 145044805 is 508440541.

It can be written as a sum of positive squares in 4 ways, for example, as 11249316 + 133795489 = 3354^2 + 11567^2 .

It is not a de Polignac number, because 145044805 - 2¹¹ = 145042757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 267835 + ... + 268375.

It is an arithmetic number, because the mean of its divisors is an integer number (7695045).

Almost surely, 2^145044805 is an apocalyptic number.

It is an amenable number.

145044805 is a deficient number, since it is larger than the sum of its proper divisors (39636275).

145044805 is an equidigital number, since it uses as much as digits as its factorization.

145044805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 618 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 145044805 is about 12043.4548614590. The cubic root of 145044805 is about 525.4128936318.

The spelling of 145044805 in words is "one hundred forty-five million, forty-four thousand, eight hundred five".