1256205 has 16 divisors (see below), whose sum is σ = 2036160. Its totient is φ = 661248.

The previous prime is 1256201. The next prime is 1256209. The reversal of 1256205 is 5026521.

It is an interprime number because it is at equal distance from previous prime (1256201) and next prime (1256209).

It is not a de Polignac number, because 1256205 - 2² = 1256201 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741 + ... + 1749.

It is an arithmetic number, because the mean of its divisors is an integer number (127260).

2^1256205 is an apocalyptic number.

1256205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1256205 is a deficient number, since it is larger than the sum of its proper divisors (779955).

1256205 is a wasteful number, since it uses less digits than its factorization.

1256205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1100.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1256205 is about 1120.8055139051. The cubic root of 1256205 is about 107.8996839419.

The spelling of 1256205 in words is "one million, two hundred fifty-six thousand, two hundred five".