140021137 has 2 divisors, whose sum is σ = 140021138. Its totient is φ = 140021136.

The previous prime is 140021107. The next prime is 140021153. The reversal of 140021137 is 731120041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137921536 + 2099601 = 11744^2 + 1449^2 .

It is an emirp because it is prime and its reverse (731120041) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140021137 is a prime.

It is not a weakly prime, because it can be changed into another prime (140021107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70010568 + 70010569.

It is an arithmetic number, because the mean of its divisors is an integer number (70010569).

Almost surely, 2^140021137 is an apocalyptic number.

It is an amenable number.

140021137 is a deficient number, since it is larger than the sum of its proper divisors (1).

140021137 is an equidigital number, since it uses as much as digits as its factorization.

140021137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 140021137 is about 11833.0527337623. The cubic root of 140021137 is about 519.2755407148.

Adding to 140021137 its reverse (731120041), we get a palindrome (871141178).

The spelling of 140021137 in words is "one hundred forty million, twenty-one thousand, one hundred thirty-seven".