1240041157 has 2 divisors, whose sum is σ = 1240041158. Its totient is φ = 1240041156.

The previous prime is 1240041139. The next prime is 1240041163. The reversal of 1240041157 is 7511400421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799419076 + 440622081 = 28274^2 + 20991^2 .

It is a cyclic number.

It is not a de Polignac number, because 1240041157 - 2⁷ = 1240041029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240041167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620020578 + 620020579.

It is an arithmetic number, because the mean of its divisors is an integer number (620020579).

Almost surely, 2^1240041157 is an apocalyptic number.

It is an amenable number.

1240041157 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240041157 is an equidigital number, since it uses as much as digits as its factorization.

1240041157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 1240041157 is about 35214.2181085993. The cubic root of 1240041157 is about 1074.3489570109.

Adding to 1240041157 its reverse (7511400421), we get a palindrome (8751441578).

The spelling of 1240041157 in words is "one billion, two hundred forty million, forty-one thousand, one hundred fifty-seven".