102240157 has 2 divisors, whose sum is σ = 102240158. Its totient is φ = 102240156.

The previous prime is 102240143. The next prime is 102240161. The reversal of 102240157 is 751042201.

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., 96412761 + 5827396 = 9819^2 + 2414^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102240157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102244157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51120078 + 51120079.

It is an arithmetic number, because the mean of its divisors is an integer number (51120079).

Almost surely, 2^102240157 is an apocalyptic number.

It is an amenable number.

102240157 is a deficient number, since it is larger than the sum of its proper divisors (1).

102240157 is an equidigital number, since it uses as much as digits as its factorization.

102240157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 102240157 is about 10111.3874913387. The cubic root of 102240157 is about 467.5992822971.

Adding to 102240157 its reverse (751042201), we get a palindrome (853282358).

The spelling of 102240157 in words is "one hundred two million, two hundred forty thousand, one hundred fifty-seven".