74721841 has 4 divisors (see below), whose sum is σ = 74858992. Its totient is φ = 74584692.

The previous prime is 74721839. The next prime is 74721863. The reversal of 74721841 is 14812747.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14812747 = 2591 ⋅5717.

It is a cyclic number.

It is not a de Polignac number, because 74721841 - 2¹ = 74721839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74721797 and 74721806.

It is not an unprimeable number, because it can be changed into a prime (74721821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67755 + ... + 68848.

It is an arithmetic number, because the mean of its divisors is an integer number (18714748).

Almost surely, 2^74721841 is an apocalyptic number.

It is an amenable number.

74721841 is a deficient number, since it is larger than the sum of its proper divisors (137151).

74721841 is a wasteful number, since it uses less digits than its factorization.

74721841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137150.

The product of its digits is 12544, while the sum is 34.

The square root of 74721841 is about 8644.1796024840. The cubic root of 74721841 is about 421.1943348213.

The spelling of 74721841 in words is "seventy-four million, seven hundred twenty-one thousand, eight hundred forty-one".