42760121 has 2 divisors, whose sum is σ = 42760122. Its totient is φ = 42760120.

The previous prime is 42760111. The next prime is 42760147. The reversal of 42760121 is 12106724.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42758521 + 1600 = 6539^2 + 40^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42760121 is a prime.

It is not a weakly prime, because it can be changed into another prime (42760111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21380060 + 21380061.

It is an arithmetic number, because the mean of its divisors is an integer number (21380061).

Almost surely, 2^42760121 is an apocalyptic number.

It is an amenable number.

42760121 is a deficient number, since it is larger than the sum of its proper divisors (1).

42760121 is an equidigital number, since it uses as much as digits as its factorization.

42760121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 42760121 is about 6539.1223417214. The cubic root of 42760121 is about 349.6871244761.

Adding to 42760121 its reverse (12106724), we get a palindrome (54866845).

The spelling of 42760121 in words is "forty-two million, seven hundred sixty thousand, one hundred twenty-one".