1203855 has 16 divisors (see below), whose sum is σ = 2039904. Its totient is φ = 604160.

The previous prime is 1203841. The next prime is 1203863. The reversal of 1203855 is 5583021.

It is not a de Polignac number, because 1203855 - 2⁶ = 1203791 is a prime.

It is a super-2 number, since 2×1203855² = 2898533722050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106 + ... + 2615.

It is an arithmetic number, because the mean of its divisors is an integer number (127494).

2^1203855 is an apocalyptic number.

1203855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1203855 is a deficient number, since it is larger than the sum of its proper divisors (836049).

1203855 is a wasteful number, since it uses less digits than its factorization.

1203855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4746.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1203855 is about 1097.2032628460. The cubic root of 1203855 is about 106.3795283037.

Adding to 1203855 its reverse (5583021), we get a palindrome (6786876).

The spelling of 1203855 in words is "one million, two hundred three thousand, eight hundred fifty-five".