1121320457 has 2 divisors, whose sum is σ = 1121320458. Its totient is φ = 1121320456.

The previous prime is 1121320427. The next prime is 1121320469. The reversal of 1121320457 is 7540231211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 922397641 + 198922816 = 30371^2 + 14104^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121320457 - 2⁶ = 1121320393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121320427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560660228 + 560660229.

It is an arithmetic number, because the mean of its divisors is an integer number (560660229).

Almost surely, 2^1121320457 is an apocalyptic number.

It is an amenable number.

1121320457 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121320457 is an equidigital number, since it uses as much as digits as its factorization.

1121320457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1121320457 is about 33486.1233498296. The cubic root of 1121320457 is about 1038.9067830133.

Adding to 1121320457 its reverse (7540231211), we get a palindrome (8661551668).

The spelling of 1121320457 in words is "one billion, one hundred twenty-one million, three hundred twenty thousand, four hundred fifty-seven".