42261261827 has 2 divisors, whose sum is σ = 42261261828. Its totient is φ = 42261261826.

The previous prime is 42261261797. The next prime is 42261261829. The reversal of 42261261827 is 72816216224.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42261261827 is a prime.

Together with 42261261829, 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 (42261261829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21130630913 + 21130630914.

It is an arithmetic number, because the mean of its divisors is an integer number (21130630914).

Almost surely, 2^42261261827 is an apocalyptic number.

42261261827 is a deficient number, since it is larger than the sum of its proper divisors (1).

42261261827 is an equidigital number, since it uses as much as digits as its factorization.

42261261827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The spelling of 42261261827 in words is "forty-two billion, two hundred sixty-one million, two hundred sixty-one thousand, eight hundred twenty-seven".