1225899 has 24 divisors (see below), whose sum is σ = 1909440. Its totient is φ = 755568.

The previous prime is 1225897. The next prime is 1225907. The reversal of 1225899 is 9985221.

It is not a de Polignac number, because 1225899 - 2¹ = 1225897 is a prime.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1225891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11404 + ... + 11510.

It is an arithmetic number, because the mean of its divisors is an integer number (79560).

2^1225899 is an apocalyptic number.

1225899 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1225899 is a deficient number, since it is larger than the sum of its proper divisors (683541).

1225899 is a wasteful number, since it uses less digits than its factorization.

1225899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The square root of 1225899 is about 1107.2032333768. The cubic root of 1225899 is about 107.0249163158.

The spelling of 1225899 in words is "one million, two hundred twenty-five thousand, eight hundred ninety-nine".