74126321 has 4 divisors (see below), whose sum is σ = 75232752. Its totient is φ = 73019892.

The previous prime is 74126279. The next prime is 74126347. The reversal of 74126321 is 12362147.

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: 12362147 = 7 ⋅1766021.

It is a cyclic number.

It is not a de Polignac number, because 74126321 - 2⁶ = 74126257 is a prime.

It is a super-2 number, since 2×74126321² = 10989422929990082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74146321) 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, 553115 + ... + 553248.

It is an arithmetic number, because the mean of its divisors is an integer number (18808188).

Almost surely, 2^74126321 is an apocalyptic number.

It is an amenable number.

74126321 is a deficient number, since it is larger than the sum of its proper divisors (1106431).

74126321 is a wasteful number, since it uses less digits than its factorization.

74126321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106430.

The product of its digits is 2016, while the sum is 26.

The square root of 74126321 is about 8609.6643953176. The cubic root of 74126321 is about 420.0724005950.

Adding to 74126321 its reverse (12362147), we get a palindrome (86488468).

It can be divided in two parts, 74126 and 321, that added together give a palindrome (74447).

The spelling of 74126321 in words is "seventy-four million, one hundred twenty-six thousand, three hundred twenty-one".