1225986 has 8 divisors (see below), whose sum is σ = 2451984. Its totient is φ = 408660.

The previous prime is 1225981. The next prime is 1225997. The reversal of 1225986 is 6895221.

It is a sphenic number, since it is the product of 3 distinct primes.

1225986 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1225981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102160 + ... + 102171.

It is an arithmetic number, because the mean of its divisors is an integer number (306498).

2^1225986 is an apocalyptic number.

1225986 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1225986 is a wasteful number, since it uses less digits than its factorization.

1225986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204336.

The product of its digits is 8640, while the sum is 33.

The square root of 1225986 is about 1107.2425208598. The cubic root of 1225986 is about 107.0274480490.

It can be divided in two parts, 1225 and 986, that added together give a triangular number (2211 = T₆₆).

The spelling of 1225986 in words is "one million, two hundred twenty-five thousand, nine hundred eighty-six".