42707261 has 2 divisors, whose sum is σ = 42707262. Its totient is φ = 42707260.

The previous prime is 42707219. The next prime is 42707279. The reversal of 42707261 is 16270724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 12292036 = 5515^2 + 3506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42707261 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 (42707201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21353630 + 21353631.

It is an arithmetic number, because the mean of its divisors is an integer number (21353631).

Almost surely, 2^42707261 is an apocalyptic number.

It is an amenable number.

42707261 is a deficient number, since it is larger than the sum of its proper divisors (1).

42707261 is an equidigital number, since it uses as much as digits as its factorization.

42707261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 42707261 is about 6535.0792650128. The cubic root of 42707261 is about 349.5429708191.

Adding to 42707261 its reverse (16270724), we get a palindrome (58977985).

The spelling of 42707261 in words is "forty-two million, seven hundred seven thousand, two hundred sixty-one".