1445729 has 4 divisors (see below), whose sum is σ = 1521840. Its totient is φ = 1369620.

The previous prime is 1445723. The next prime is 1445749. The reversal of 1445729 is 9275441.

It is a happy number.

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: 9275441 = 7 ⋅1325063.

It is a cyclic number.

It is not a de Polignac number, because 1445729 - 2⁴ = 1445713 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1445695 and 1445704.

It is not an unprimeable number, because it can be changed into a prime (1445723) 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, 38027 + ... + 38064.

It is an arithmetic number, because the mean of its divisors is an integer number (380460).

2^1445729 is an apocalyptic number.

1445729 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1445729 is a deficient number, since it is larger than the sum of its proper divisors (76111).

1445729 is an equidigital number, since it uses as much as digits as its factorization.

1445729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76110.

The product of its digits is 10080, while the sum is 32.

The square root of 1445729 is about 1202.3847138084. The cubic root of 1445729 is about 113.0738807323.

The spelling of 1445729 in words is "one million, four hundred forty-five thousand, seven hundred twenty-nine".