1203440257 has 2 divisors, whose sum is σ = 1203440258. Its totient is φ = 1203440256.

The previous prime is 1203440197. The next prime is 1203440261. The reversal of 1203440257 is 7520443021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1178480241 + 24960016 = 34329^2 + 4996^2 .

It is a cyclic number.

It is not a de Polignac number, because 1203440257 - 2⁷ = 1203440129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1203440657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 601720128 + 601720129.

It is an arithmetic number, because the mean of its divisors is an integer number (601720129).

Almost surely, 2^1203440257 is an apocalyptic number.

It is an amenable number.

1203440257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1203440257 is an equidigital number, since it uses as much as digits as its factorization.

1203440257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 1203440257 is about 34690.6364455886. The cubic root of 1203440257 is about 1063.6731054427.

Adding to 1203440257 its reverse (7520443021), we get a palindrome (8723883278).

The spelling of 1203440257 in words is "one billion, two hundred three million, four hundred forty thousand, two hundred fifty-seven".