45721841 has 4 divisors (see below), whose sum is σ = 49878384. Its totient is φ = 41565300.

The previous prime is 45721829. The next prime is 45721853. The reversal of 45721841 is 14812754.

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 (45721829) and next prime (45721853).

It is a cyclic number.

It is not a de Polignac number, because 45721841 - 2¹⁸ = 45459697 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45721798 and 45721807.

It is not an unprimeable number, because it can be changed into a prime (45721811) 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, 2078255 + ... + 2078276.

It is an arithmetic number, because the mean of its divisors is an integer number (12469596).

Almost surely, 2^45721841 is an apocalyptic number.

It is an amenable number.

45721841 is a deficient number, since it is larger than the sum of its proper divisors (4156543).

45721841 is a wasteful number, since it uses less digits than its factorization.

45721841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156542.

The product of its digits is 8960, while the sum is 32.

The square root of 45721841 is about 6761.7927356582. The cubic root of 45721841 is about 357.5811112353.

The spelling of 45721841 in words is "forty-five million, seven hundred twenty-one thousand, eight hundred forty-one".