Search a number
BaseRepresentation
bin100111010110000001001
32102111111002
410322300021
5312223400
643344345
713646450
oct4726011
92374432
101289225
11800683
125220b5
13361a72
14257b97
151a6ed5
hex13ac09

1289225 has 24 divisors (see below), whose sum is σ = 1874880. Its totient is φ = 861120.

The previous prime is 1289213. The next prime is 1289231. The reversal of 1289225 is 5229821.

It is not a de Polignac number, because 1289225 - 210 = 1288201 is a prime.

It is a super-2 number, since 2×12892252 = 3324202201250, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

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, 9206 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (78120).

21289225 is an apocalyptic number.

It is an amenable number.

1289225 is a deficient number, since it is larger than the sum of its proper divisors (585655).

1289225 is a wasteful number, since it uses less digits than its factorization.

1289225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 204 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 1289225 is about 1135.4404431761. The cubic root of 1289225 is about 108.8369191047.

The spelling of 1289225 in words is "one million, two hundred eighty-nine thousand, two hundred twenty-five".