1200255 has 48 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 517440.

The previous prime is 1200253. The next prime is 1200307. The reversal of 1200255 is 5520021.

It is not a de Polignac number, because 1200255 - 2¹ = 1200253 is a prime.

It is a super-2 number, since 2×1200255² = 2881224130050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16870 + ... + 16940.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2^1200255 is an apocalyptic number.

1200255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1200255 is a deficient number, since it is larger than the sum of its proper divisors (1163649).

1200255 is a wasteful number, since it uses less digits than its factorization.

1200255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116 (or 109 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1200255 is about 1095.5614998712. The cubic root of 1200255 is about 106.2733835500.

Adding to 1200255 its reverse (5520021), we get a palindrome (6720276).

The spelling of 1200255 in words is "one million, two hundred thousand, two hundred fifty-five".