140156557 has 2 divisors, whose sum is σ = 140156558. Its totient is φ = 140156556.

The previous prime is 140156537. The next prime is 140156567. The reversal of 140156557 is 755651041.

140156557 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., 127667401 + 12489156 = 11299^2 + 3534^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140156557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140156537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70078278 + 70078279.

It is an arithmetic number, because the mean of its divisors is an integer number (70078279).

Almost surely, 2^140156557 is an apocalyptic number.

It is an amenable number.

140156557 is a deficient number, since it is larger than the sum of its proper divisors (1).

140156557 is an equidigital number, since it uses as much as digits as its factorization.

140156557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 140156557 is about 11838.7734584289. The cubic root of 140156557 is about 519.4428907725.

The spelling of 140156557 in words is "one hundred forty million, one hundred fifty-six thousand, five hundred fifty-seven".