41387721 has 4 divisors (see below), whose sum is σ = 55183632. Its totient is φ = 27591812.

The previous prime is 41387713. The next prime is 41387729. The reversal of 41387721 is 12778314.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (41387713) and next prime (41387729).

It is a cyclic number.

It is not a de Polignac number, because 41387721 - 2³ = 41387713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (41387729) 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, 6897951 + ... + 6897956.

It is an arithmetic number, because the mean of its divisors is an integer number (13795908).

Almost surely, 2^41387721 is an apocalyptic number.

It is an amenable number.

41387721 is a deficient number, since it is larger than the sum of its proper divisors (13795911).

41387721 is a wasteful number, since it uses less digits than its factorization.

41387721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13795910.

The product of its digits is 9408, while the sum is 33.

The square root of 41387721 is about 6433.3289205512. The cubic root of 41387721 is about 345.9052638045.

The spelling of 41387721 in words is "forty-one million, three hundred eighty-seven thousand, seven hundred twenty-one".