41278121 has 2 divisors, whose sum is σ = 41278122. Its totient is φ = 41278120.

The previous prime is 41278117. The next prime is 41278157. The reversal of 41278121 is 12187214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33235225 + 8042896 = 5765^2 + 2836^2 .

It is a cyclic number.

It is not a de Polignac number, because 41278121 - 2² = 41278117 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is equal to p_2506607 and since 41278121 and 2506607 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (41275121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20639060 + 20639061.

It is an arithmetic number, because the mean of its divisors is an integer number (20639061).

Almost surely, 2^41278121 is an apocalyptic number.

It is an amenable number.

41278121 is a deficient number, since it is larger than the sum of its proper divisors (1).

41278121 is an equidigital number, since it uses as much as digits as its factorization.

41278121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 26.

The square root of 41278121 is about 6424.8051332317. The cubic root of 41278121 is about 345.5996600336.

The spelling of 41278121 in words is "forty-one million, two hundred seventy-eight thousand, one hundred twenty-one".