1445845 has 4 divisors (see below), whose sum is σ = 1735020. Its totient is φ = 1156672.

The previous prime is 1445831. The next prime is 1445863. The reversal of 1445845 is 5485441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 815409 + 630436 = 903^2 + 794^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445845 - 2⁹ = 1445333 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144580 + ... + 144589.

It is an arithmetic number, because the mean of its divisors is an integer number (433755).

2^1445845 is an apocalyptic number.

It is an amenable number.

1445845 is a deficient number, since it is larger than the sum of its proper divisors (289175).

1445845 is an equidigital number, since it uses as much as digits as its factorization.

1445845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289174.

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

The square root of 1445845 is about 1202.4329503137. The cubic root of 1445845 is about 113.0769048628.

It can be divided in two parts, 1445 and 845, that multiplied together give a square (1221025 = 1105²).

The spelling of 1445845 in words is "one million, four hundred forty-five thousand, eight hundred forty-five".