140260242148721 has 2 divisors, whose sum is σ = 140260242148722. Its totient is φ = 140260242148720.

The previous prime is 140260242148693. The next prime is 140260242148753. The reversal of 140260242148721 is 127841242062041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79209288001600 + 61050954147121 = 8899960^2 + 7813511^2 .

It is a cyclic number.

It is not a de Polignac number, because 140260242148721 - 2¹⁸ = 140260241886577 is a prime.

It is not a weakly prime, because it can be changed into another prime (140260242148921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70130121074360 + 70130121074361.

It is an arithmetic number, because the mean of its divisors is an integer number (70130121074361).

Almost surely, 2^{140260242148721} is an apocalyptic number.

It is an amenable number.

140260242148721 is a deficient number, since it is larger than the sum of its proper divisors (1).

140260242148721 is an equidigital number, since it uses as much as digits as its factorization.

140260242148721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 44.

The spelling of 140260242148721 in words is "one hundred forty trillion, two hundred sixty billion, two hundred forty-two million, one hundred forty-eight thousand, seven hundred twenty-one".