1223775 has 72 divisors (see below), whose sum is σ = 2685840. Its totient is φ = 544320.

The previous prime is 1223773. The next prime is 1223777. The reversal of 1223775 is 5773221.

It is an interprime number because it is at equal distance from previous prime (1223773) and next prime (1223777).

It is not a de Polignac number, because 1223775 - 2¹ = 1223773 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

Its product of digits (2940) is a multiple of the sum of its prime factors (70).

1223775 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223773) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 33057 + ... + 33093.

2^1223775 is an apocalyptic number.

1223775 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1223775 is an abundant number, since it is smaller than the sum of its proper divisors (1462065).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223775 is a wasteful number, since it uses less digits than its factorization.

1223775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70 (or 52 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 1223775 is about 1106.2436440495. The cubic root of 1223775 is about 106.9630699118.

Adding to 1223775 its reverse (5773221), we get a palindrome (6996996).

The spelling of 1223775 in words is "one million, two hundred twenty-three thousand, seven hundred seventy-five".