1240111541 has 2 divisors, whose sum is σ = 1240111542. Its totient is φ = 1240111540.

The previous prime is 1240111519. The next prime is 1240111547. The reversal of 1240111541 is 1451110421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1061782225 + 178329316 = 32585^2 + 13354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240111541 - 2¹⁰ = 1240110517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240111547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620055770 + 620055771.

It is an arithmetic number, because the mean of its divisors is an integer number (620055771).

Almost surely, 2^1240111541 is an apocalyptic number.

It is an amenable number.

1240111541 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240111541 is an equidigital number, since it uses as much as digits as its factorization.

1240111541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 1240111541 is about 35215.2174634773. The cubic root of 1240111541 is about 1074.3692830960.

Adding to 1240111541 its reverse (1451110421), we get a palindrome (2691221962).

The spelling of 1240111541 in words is "one billion, two hundred forty million, one hundred eleven thousand, five hundred forty-one".