74321641 has 9 divisors (see below), whose sum is σ = 76713861. Its totient is φ = 72002592.

The previous prime is 74321633. The next prime is 74321657. The reversal of 74321641 is 14612347.

The square root of 74321641 is 8621.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1390041 + 72931600 = 1179^2 + 8540^2 .

It is not a de Polignac number, because 74321641 - 2³ = 74321633 is a prime.

It is a super-3 number, since 3×74321641³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74321041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 318861 + ... + 319093.

Almost surely, 2^74321641 is an apocalyptic number.

74321641 is the 8621-st square number.

74321641 is the 4311-st centered octagonal number.

It is an amenable number.

74321641 is a deficient number, since it is larger than the sum of its proper divisors (2392220).

74321641 is an frugal number, since it uses more digits than its factorization.

74321641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 270 counting only the distinct ones).

The product of its digits is 4032, while the sum is 28.

The cubic root of 74321641 is about 420.4410352023.

Adding to 74321641 its reverse (14612347), we get a palindrome (88933988).

The spelling of 74321641 in words is "seventy-four million, three hundred twenty-one thousand, six hundred forty-one".