1187552257 has 2 divisors, whose sum is σ = 1187552258. Its totient is φ = 1187552256.

The previous prime is 1187552207. The next prime is 1187552273. The reversal of 1187552257 is 7522557811.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 793886976 + 393665281 = 28176^2 + 19841^2 .

It is a cyclic number.

It is not a de Polignac number, because 1187552257 - 2⁷ = 1187552129 is a prime.

It is not a weakly prime, because it can be changed into another prime (1187552207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593776128 + 593776129.

It is an arithmetic number, because the mean of its divisors is an integer number (593776129).

Almost surely, 2^1187552257 is an apocalyptic number.

It is an amenable number.

1187552257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187552257 is an equidigital number, since it uses as much as digits as its factorization.

1187552257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 196000, while the sum is 43.

The square root of 1187552257 is about 34460.8800961322. The cubic root of 1187552257 is about 1058.9714292698.

The spelling of 1187552257 in words is "one billion, one hundred eighty-seven million, five hundred fifty-two thousand, two hundred fifty-seven".