1225897 has 2 divisors, whose sum is σ = 1225898. Its totient is φ = 1225896.

The previous prime is 1225891. The next prime is 1225907. The reversal of 1225897 is 7985221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1157776 + 68121 = 1076^2 + 261^2 .

It is an emirp because it is prime and its reverse (7985221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1225897 - 2⁷ = 1225769 is a prime.

It is not a weakly prime, because it can be changed into another prime (1225891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612948 + 612949.

It is an arithmetic number, because the mean of its divisors is an integer number (612949).

2^1225897 is an apocalyptic number.

It is an amenable number.

1225897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225897 is an equidigital number, since it uses as much as digits as its factorization.

1225897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 34.

The square root of 1225897 is about 1107.2023301999. The cubic root of 1225897 is about 107.0248581137.

The spelling of 1225897 in words is "one million, two hundred twenty-five thousand, eight hundred ninety-seven".