42101261 has 2 divisors, whose sum is σ = 42101262. Its totient is φ = 42101260.

The previous prime is 42101249. The next prime is 42101273. The reversal of 42101261 is 16210124.

It is a balanced prime because it is at equal distance from previous prime (42101249) and next prime (42101273).

It can be written as a sum of positive squares in only one way, i.e., 37283236 + 4818025 = 6106^2 + 2195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42101261 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42101561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050630 + 21050631.

It is an arithmetic number, because the mean of its divisors is an integer number (21050631).

Almost surely, 2^42101261 is an apocalyptic number.

It is an amenable number.

42101261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42101261 is an equidigital number, since it uses as much as digits as its factorization.

42101261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 42101261 is about 6488.5484509249. The cubic root of 42101261 is about 347.8817941996.

Adding to 42101261 its reverse (16210124), we get a palindrome (58311385).

The spelling of 42101261 in words is "forty-two million, one hundred one thousand, two hundred sixty-one".