42711121 has 2 divisors, whose sum is σ = 42711122. Its totient is φ = 42711120.

The previous prime is 42711077. The next prime is 42711127. The reversal of 42711121 is 12111724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30030400 + 12680721 = 5480^2 + 3561^2 .

It is a cyclic number.

It is not a de Polignac number, because 42711121 - 2²³ = 34322513 is a prime.

It is not a weakly prime, because it can be changed into another prime (42711127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21355560 + 21355561.

It is an arithmetic number, because the mean of its divisors is an integer number (21355561).

Almost surely, 2^42711121 is an apocalyptic number.

It is an amenable number.

42711121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42711121 is an equidigital number, since it uses as much as digits as its factorization.

42711121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112, while the sum is 19.

The square root of 42711121 is about 6535.3745875810. The cubic root of 42711121 is about 349.5535013876.

Adding to 42711121 its reverse (12111724), we get a palindrome (54822845).

The spelling of 42711121 in words is "forty-two million, seven hundred eleven thousand, one hundred twenty-one".