1355505247 has 2 divisors, whose sum is σ = 1355505248. Its totient is φ = 1355505246.

The previous prime is 1355505131. The next prime is 1355505271. The reversal of 1355505247 is 7425055531.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1355505247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1355506247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 677752623 + 677752624.

It is an arithmetic number, because the mean of its divisors is an integer number (677752624).

Almost surely, 2^1355505247 is an apocalyptic number.

1355505247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1355505247 is an equidigital number, since it uses as much as digits as its factorization.

1355505247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105000, while the sum is 37.

The square root of 1355505247 is about 36817.1868425604. The cubic root of 1355505247 is about 1106.7097456356.

The spelling of 1355505247 in words is "one billion, three hundred fifty-five million, five hundred five thousand, two hundred forty-seven".