1445281 has 4 divisors (see below), whose sum is σ = 1450672. Its totient is φ = 1439892.

The previous prime is 1445261. The next prime is 1445287. The reversal of 1445281 is 1825441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1825441 = 23 ⋅79367.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1445281 is a prime.

It is a super-2 number, since 2×1445281² = 4177674337922, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (1445287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2271 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (362668).

2^1445281 is an apocalyptic number.

It is an amenable number.

1445281 is a deficient number, since it is larger than the sum of its proper divisors (5391).

1445281 is an equidigital number, since it uses as much as digits as its factorization.

1445281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5390.

The product of its digits is 1280, while the sum is 25.

The square root of 1445281 is about 1202.1984029269. The cubic root of 1445281 is about 113.0621998128.

The spelling of 1445281 in words is "one million, four hundred forty-five thousand, two hundred eighty-one".