1557795241 has 2 divisors, whose sum is σ = 1557795242. Its totient is φ = 1557795240.

The previous prime is 1557795227. The next prime is 1557795251. The reversal of 1557795241 is 1425977551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1225280016 + 332515225 = 35004^2 + 18235^2 .

It is a cyclic number.

It is not a de Polignac number, because 1557795241 - 2⁹ = 1557794729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1557795191 and 1557795200.

It is not a weakly prime, because it can be changed into another prime (1557795251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 778897620 + 778897621.

It is an arithmetic number, because the mean of its divisors is an integer number (778897621).

Almost surely, 2^1557795241 is an apocalyptic number.

It is an amenable number.

1557795241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1557795241 is an equidigital number, since it uses as much as digits as its factorization.

1557795241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 441000, while the sum is 46.

The square root of 1557795241 is about 39468.9148698061. The cubic root of 1557795241 is about 1159.2313677878.

The spelling of 1557795241 in words is "one billion, five hundred fifty-seven million, seven hundred ninety-five thousand, two hundred forty-one".