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1225889 = 7732399
BaseRepresentation
bin100101011010010100001
32022021121022
410223102201
5303212024
642135225
713264010
oct4532241
92267538
101225889
11768035
124b1515
1333bca2
1423ca77
1519335e
hex12b4a1

1225889 has 8 divisors (see below), whose sum is σ = 1420800. Its totient is φ = 1035936.

The previous prime is 1225883. The next prime is 1225891. The reversal of 1225889 is 9885221.

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

It is a cyclic number.

It is not a de Polignac number, because 1225889 - 212 = 1221793 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1225883) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (177600).

21225889 is an apocalyptic number.

It is an amenable number.

1225889 is a deficient number, since it is larger than the sum of its proper divisors (194911).

1225889 is an equidigital number, since it uses as much as digits as its factorization.

1225889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479.

The product of its digits is 11520, while the sum is 35.

The square root of 1225889 is about 1107.1987174848. The cubic root of 1225889 is about 107.0246253044.

The spelling of 1225889 in words is "one million, two hundred twenty-five thousand, eight hundred eighty-nine".

Divisors: 1 7 73 511 2399 16793 175127 1225889