1369542257 has 2 divisors, whose sum is σ = 1369542258. Its totient is φ = 1369542256.

The previous prime is 1369542233. The next prime is 1369542289. The reversal of 1369542257 is 7522459631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1169913616 + 199628641 = 34204^2 + 14129^2 .

It is an emirp because it is prime and its reverse (7522459631) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1369542257 - 2⁶ = 1369542193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1369542157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 684771128 + 684771129.

It is an arithmetic number, because the mean of its divisors is an integer number (684771129).

Almost surely, 2^1369542257 is an apocalyptic number.

It is an amenable number.

1369542257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1369542257 is an equidigital number, since it uses as much as digits as its factorization.

1369542257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 44.

The square root of 1369542257 is about 37007.3270718111. The cubic root of 1369542257 is about 1110.5168323369.

The spelling of 1369542257 in words is "one billion, three hundred sixty-nine million, five hundred forty-two thousand, two hundred fifty-seven".