1225187 has 4 divisors (see below), whose sum is σ = 1278480. Its totient is φ = 1171896.

The previous prime is 1225183. The next prime is 1225219. The reversal of 1225187 is 7815221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7815221 = 53 ⋅147457.

It is not a de Polignac number, because 1225187 - 2² = 1225183 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1225183) 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 3 ways as a sum of consecutive naturals, for example, 26612 + ... + 26657.

It is an arithmetic number, because the mean of its divisors is an integer number (319620).

2^1225187 is an apocalyptic number.

1225187 is a deficient number, since it is larger than the sum of its proper divisors (53293).

1225187 is an equidigital number, since it uses as much as digits as its factorization.

1225187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53292.

The product of its digits is 1120, while the sum is 26.

The square root of 1225187 is about 1106.8816558241. The cubic root of 1225187 is about 107.0041923416.

The spelling of 1225187 in words is "one million, two hundred twenty-five thousand, one hundred eighty-seven".