1206855 has 24 divisors (see below), whose sum is σ = 2253888. Its totient is φ = 593856.

The previous prime is 1206841. The next prime is 1206869. The reversal of 1206855 is 5586021.

It is an interprime number because it is at equal distance from previous prime (1206841) and next prime (1206869).

It is not a de Polignac number, because 1206855 - 2⁶ = 1206791 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 447 + ... + 1616.

It is an arithmetic number, because the mean of its divisors is an integer number (93912).

2^1206855 is an apocalyptic number.

1206855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1206855 is a deficient number, since it is larger than the sum of its proper divisors (1047033).

1206855 is a wasteful number, since it uses less digits than its factorization.

1206855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2087 (or 2084 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1206855 is about 1098.5695244271. The cubic root of 1206855 is about 106.4678207348.

The spelling of 1206855 in words is "one million, two hundred six thousand, eight hundred fifty-five".