42091277 has 2 divisors, whose sum is σ = 42091278. Its totient is φ = 42091276.

The previous prime is 42091207. The next prime is 42091319. The reversal of 42091277 is 77219024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27237961 + 14853316 = 5219^2 + 3854^2 .

It is a cyclic number.

It is not a de Polignac number, because 42091277 - 2¹⁸ = 41829133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42091207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21045638 + 21045639.

It is an arithmetic number, because the mean of its divisors is an integer number (21045639).

Almost surely, 2^42091277 is an apocalyptic number.

It is an amenable number.

42091277 is a deficient number, since it is larger than the sum of its proper divisors (1).

42091277 is an equidigital number, since it uses as much as digits as its factorization.

42091277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 42091277 is about 6487.7790498752. The cubic root of 42091277 is about 347.8542928347.

The spelling of 42091277 in words is "forty-two million, ninety-one thousand, two hundred seventy-seven".