1225261 has 2 divisors, whose sum is σ = 1225262. Its totient is φ = 1225260.

The previous prime is 1225223. The next prime is 1225283. The reversal of 1225261 is 1625221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223236 + 2025 = 1106^2 + 45^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1225261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1225061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612630 + 612631.

It is an arithmetic number, because the mean of its divisors is an integer number (612631).

2^1225261 is an apocalyptic number.

It is an amenable number.

1225261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1225261 is an equidigital number, since it uses as much as digits as its factorization.

1225261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 240, while the sum is 19.

The square root of 1225261 is about 1106.9150825605. The cubic root of 1225261 is about 107.0063466116.

The spelling of 1225261 in words is "one million, two hundred twenty-five thousand, two hundred sixty-one".