1445155 has 4 divisors (see below), whose sum is σ = 1734192. Its totient is φ = 1156120.

The previous prime is 1445149. The next prime is 1445161. The reversal of 1445155 is 5515441.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1445149) and next prime (1445161).

It is a de Polignac number, because none of the positive numbers 2^k-1445155 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

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, 144511 + ... + 144520.

It is an arithmetic number, because the mean of its divisors is an integer number (433548).

2^1445155 is an apocalyptic number.

1445155 is a deficient number, since it is larger than the sum of its proper divisors (289037).

1445155 is an equidigital number, since it uses as much as digits as its factorization.

1445155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289036.

The product of its digits is 2000, while the sum is 25.

The square root of 1445155 is about 1202.1459977890. The cubic root of 1445155 is about 113.0589141193.

It can be divided in two parts, 1445 and 155, that added together give a square (1600 = 40²).

The spelling of 1445155 in words is "one million, four hundred forty-five thousand, one hundred fifty-five".