140421542057 has 2 divisors, whose sum is σ = 140421542058. Its totient is φ = 140421542056.

The previous prime is 140421542033. The next prime is 140421542059. The reversal of 140421542057 is 750245124041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106784514841 + 33637027216 = 326779^2 + 183404^2 .

It is a cyclic number.

It is not a de Polignac number, because 140421542057 - 2⁸ = 140421541801 is a prime.

Together with 140421542059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140421542059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70210771028 + 70210771029.

It is an arithmetic number, because the mean of its divisors is an integer number (70210771029).

Almost surely, 2^140421542057 is an apocalyptic number.

It is an amenable number.

140421542057 is a deficient number, since it is larger than the sum of its proper divisors (1).

140421542057 is an equidigital number, since it uses as much as digits as its factorization.

140421542057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44800, while the sum is 35.

Adding to 140421542057 its reverse (750245124041), we get a palindrome (890666666098).

The spelling of 140421542057 in words is "one hundred forty billion, four hundred twenty-one million, five hundred forty-two thousand, fifty-seven".