1225765 has 8 divisors (see below), whose sum is σ = 1493280. Its totient is φ = 965712.

The previous prime is 1225759. The next prime is 1225769. The reversal of 1225765 is 5675221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225765 - 2¹⁷ = 1094693 is a prime.

1225765 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1225769) 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, 1495 + ... + 2164.

It is an arithmetic number, because the mean of its divisors is an integer number (186660).

2^1225765 is an apocalyptic number.

It is an amenable number.

1225765 is a deficient number, since it is larger than the sum of its proper divisors (267515).

1225765 is an equidigital number, since it uses as much as digits as its factorization.

1225765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3731.

The product of its digits is 4200, while the sum is 28.

The square root of 1225765 is about 1107.1427188940. The cubic root of 1225765 is about 107.0210166304.

The spelling of 1225765 in words is "one million, two hundred twenty-five thousand, seven hundred sixty-five".