1745121 has 8 divisors (see below), whose sum is σ = 2659264. Its totient is φ = 997200.

The previous prime is 1745113. The next prime is 1745137. The reversal of 1745121 is 1215471.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1745121 - 2³ = 1745113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 83101 = 1745121 / (1 + 7 + 4 + 5 + 1 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1745111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41530 + ... + 41571.

It is an arithmetic number, because the mean of its divisors is an integer number (332408).

2^1745121 is an apocalyptic number.

It is an amenable number.

1745121 is a deficient number, since it is larger than the sum of its proper divisors (914143).

1745121 is an equidigital number, since it uses as much as digits as its factorization.

1745121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83111.

The product of its digits is 280, while the sum is 21.

The square root of 1745121 is about 1321.0302797438. The cubic root of 1745121 is about 120.3950176928.

The spelling of 1745121 in words is "one million, seven hundred forty-five thousand, one hundred twenty-one".