1445989 has 2 divisors, whose sum is σ = 1445990. Its totient is φ = 1445988.

The previous prime is 1445981. The next prime is 1446001. The reversal of 1445989 is 9895441.

1445989 is nontrivially palindromic in base 8.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1361889 + 84100 = 1167^2 + 290^2 .

It is an emirp because it is prime and its reverse (9895441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445989 - 2³ = 1445981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722994 + 722995.

It is an arithmetic number, because the mean of its divisors is an integer number (722995).

2^1445989 is an apocalyptic number.

It is an amenable number.

1445989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445989 is an equidigital number, since it uses as much as digits as its factorization.

1445989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 1445989 is about 1202.4928274214. The cubic root of 1445989 is about 113.0806587307.

The spelling of 1445989 in words is "one million, four hundred forty-five thousand, nine hundred eighty-nine".