41128721 has 2 divisors, whose sum is σ = 41128722. Its totient is φ = 41128720.

The previous prime is 41128697. The next prime is 41128739. The reversal of 41128721 is 12782114.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37650496 + 3478225 = 6136^2 + 1865^2 .

It is a cyclic number.

It is not a de Polignac number, because 41128721 - 2⁶ = 41128657 is a prime.

It is not a weakly prime, because it can be changed into another prime (41128121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20564360 + 20564361.

It is an arithmetic number, because the mean of its divisors is an integer number (20564361).

Almost surely, 2^41128721 is an apocalyptic number.

It is an amenable number.

41128721 is a deficient number, since it is larger than the sum of its proper divisors (1).

41128721 is an equidigital number, since it uses as much as digits as its factorization.

41128721 is an evil number, because the sum of its binary digits is even.

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

The square root of 41128721 is about 6413.1677819935. The cubic root of 41128721 is about 345.1822071904.

The spelling of 41128721 in words is "forty-one million, one hundred twenty-eight thousand, seven hundred twenty-one".