140421302424257 has 2 divisors, whose sum is σ = 140421302424258. Its totient is φ = 140421302424256.

The previous prime is 140421302424223. The next prime is 140421302424397. The reversal of 140421302424257 is 752424203124041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81570448836496 + 58850853587761 = 9031636^2 + 7671431^2 .

It is a cyclic number.

It is not a de Polignac number, because 140421302424257 - 2³² = 140417007456961 is a prime.

It is not a weakly prime, because it can be changed into another prime (140421302424217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70210651212128 + 70210651212129.

It is an arithmetic number, because the mean of its divisors is an integer number (70210651212129).

Almost surely, 2^{140421302424257} is an apocalyptic number.

It is an amenable number.

140421302424257 is a deficient number, since it is larger than the sum of its proper divisors (1).

140421302424257 is an equidigital number, since it uses as much as digits as its factorization.

140421302424257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 430080, while the sum is 41.

Adding to 140421302424257 its reverse (752424203124041), we get a palindrome (892845505548298).

The spelling of 140421302424257 in words is "one hundred forty trillion, four hundred twenty-one billion, three hundred two million, four hundred twenty-four thousand, two hundred fifty-seven".