1245281 has 2 divisors, whose sum is σ = 1245282. Its totient is φ = 1245280.

The previous prime is 1245227. The next prime is 1245331. The reversal of 1245281 is 1825421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1175056 + 70225 = 1084^2 + 265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245281 - 2⁶ = 1245217 is a prime.

It is a super-2 number, since 2×1245281² = 3101449537922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1245781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622640 + 622641.

It is an arithmetic number, because the mean of its divisors is an integer number (622641).

2^1245281 is an apocalyptic number.

It is an amenable number.

1245281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245281 is an equidigital number, since it uses as much as digits as its factorization.

1245281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 640, while the sum is 23.

The square root of 1245281 is about 1115.9215922277. The cubic root of 1245281 is about 107.5860065273.

The spelling of 1245281 in words is "one million, two hundred forty-five thousand, two hundred eighty-one".