1355420057 has 2 divisors, whose sum is σ = 1355420058. Its totient is φ = 1355420056.

The previous prime is 1355419973. The next prime is 1355420063. The reversal of 1355420057 is 7500245531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1268855641 + 86564416 = 35621^2 + 9304^2 .

It is a cyclic number.

It is not a de Polignac number, because 1355420057 - 2²⁰ = 1354371481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1355420257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677710028 + 677710029.

It is an arithmetic number, because the mean of its divisors is an integer number (677710029).

Almost surely, 2^1355420057 is an apocalyptic number.

It is an amenable number.

1355420057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355420057 is an equidigital number, since it uses as much as digits as its factorization.

1355420057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 32.

The square root of 1355420057 is about 36816.0298918827. The cubic root of 1355420057 is about 1106.6865605345.

Adding to 1355420057 its reverse (7500245531), we get a palindrome (8855665588).

The spelling of 1355420057 in words is "one billion, three hundred fifty-five million, four hundred twenty thousand, fifty-seven".