1445623 has 4 divisors (see below), whose sum is σ = 1492288. Its totient is φ = 1398960.

The previous prime is 1445599. The next prime is 1445657. The reversal of 1445623 is 3265441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445623 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445723) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 23286 + ... + 23347.

It is an arithmetic number, because the mean of its divisors is an integer number (373072).

2^1445623 is an apocalyptic number.

1445623 is a deficient number, since it is larger than the sum of its proper divisors (46665).

1445623 is an equidigital number, since it uses as much as digits as its factorization.

1445623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46664.

The product of its digits is 2880, while the sum is 25.

The square root of 1445623 is about 1202.3406339303. The cubic root of 1445623 is about 113.0711171613.

The spelling of 1445623 in words is "one million, four hundred forty-five thousand, six hundred twenty-three".