1187457241 has 2 divisors, whose sum is σ = 1187457242. Its totient is φ = 1187457240.

The previous prime is 1187457221. The next prime is 1187457247. The reversal of 1187457241 is 1427547811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1183635216 + 3822025 = 34404^2 + 1955^2 .

It is an emirp because it is prime and its reverse (1427547811) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1187457241 - 2⁹ = 1187456729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1187457194 and 1187457203.

It is not a weakly prime, because it can be changed into another prime (1187457247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 593728620 + 593728621.

It is an arithmetic number, because the mean of its divisors is an integer number (593728621).

Almost surely, 2^1187457241 is an apocalyptic number.

It is an amenable number.

1187457241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1187457241 is an equidigital number, since it uses as much as digits as its factorization.

1187457241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62720, while the sum is 40.

The square root of 1187457241 is about 34459.5014618610. The cubic root of 1187457241 is about 1058.9431857652.

The spelling of 1187457241 in words is "one billion, one hundred eighty-seven million, four hundred fifty-seven thousand, two hundred forty-one".