41556121 has 4 divisors (see below), whose sum is σ = 41570100. Its totient is φ = 41542144.

The previous prime is 41556107. The next prime is 41556127. The reversal of 41556121 is 12165514.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 32490000 + 9066121 = 5700^2 + 3011^2 .

It is a cyclic number.

It is not a de Polignac number, because 41556121 - 2⁷ = 41555993 is a prime.

It is a super-2 number, since 2×41556121² = 3453822385133282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41556127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 556 + ... + 9133.

It is an arithmetic number, because the mean of its divisors is an integer number (10392525).

Almost surely, 2^41556121 is an apocalyptic number.

It is an amenable number.

41556121 is a deficient number, since it is larger than the sum of its proper divisors (13979).

41556121 is an equidigital number, since it uses as much as digits as its factorization.

41556121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13978.

The product of its digits is 1200, while the sum is 25.

The square root of 41556121 is about 6446.4037261096. The cubic root of 41556121 is about 346.3737732981.

The spelling of 41556121 in words is "forty-one million, five hundred fifty-six thousand, one hundred twenty-one".