1225161 has 12 divisors (see below), whose sum is σ = 2022592. Its totient is φ = 700056.

The previous prime is 1225157. The next prime is 1225183. The reversal of 1225161 is 1615221.

It is not a de Polignac number, because 1225161 - 2² = 1225157 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

1225161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1225111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9661 + ... + 9786.

2^1225161 is an apocalyptic number.

It is an amenable number.

1225161 is a deficient number, since it is larger than the sum of its proper divisors (797431).

1225161 is a wasteful number, since it uses less digits than its factorization.

1225161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19460 (or 19457 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 1225161 is about 1106.8699110555. The cubic root of 1225161 is about 107.0034354154.

The spelling of 1225161 in words is "one million, two hundred twenty-five thousand, one hundred sixty-one".