240042157 has 2 divisors, whose sum is σ = 240042158. Its totient is φ = 240042156.

The previous prime is 240042139. The next prime is 240042161. The reversal of 240042157 is 751240042.

240042157 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195272676 + 44769481 = 13974^2 + 6691^2 .

It is a cyclic number.

It is not a de Polignac number, because 240042157 - 2¹¹ = 240040109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (240042197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 120021078 + 120021079.

It is an arithmetic number, because the mean of its divisors is an integer number (120021079).

Almost surely, 2^240042157 is an apocalyptic number.

It is an amenable number.

240042157 is a deficient number, since it is larger than the sum of its proper divisors (1).

240042157 is an equidigital number, since it uses as much as digits as its factorization.

240042157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 240042157 is about 15493.2939364100. The cubic root of 240042157 is about 621.4828856163.

Adding to 240042157 its reverse (751240042), we get a palindrome (991282199).

The spelling of 240042157 in words is "two hundred forty million, forty-two thousand, one hundred fifty-seven".