42026290261 has 2 divisors, whose sum is σ = 42026290262. Its totient is φ = 42026290260.

The previous prime is 42026290237. The next prime is 42026290309. The reversal of 42026290261 is 16209262024.

42026290261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28020751236 + 14005539025 = 167394^2 + 118345^2 .

It is a cyclic number.

It is not a de Polignac number, because 42026290261 - 2²¹ = 42024193109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42026290661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21013145130 + 21013145131.

It is an arithmetic number, because the mean of its divisors is an integer number (21013145131).

Almost surely, 2^42026290261 is an apocalyptic number.

It is an amenable number.

42026290261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42026290261 is an equidigital number, since it uses as much as digits as its factorization.

42026290261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 42026290261 in words is "forty-two billion, twenty-six million, two hundred ninety thousand, two hundred sixty-one".