74327421 has 16 divisors (see below), whose sum is σ = 118185984. Its totient is φ = 40625904.

The previous prime is 74327419. The next prime is 74327437. The reversal of 74327421 is 12472347.

It is not a de Polignac number, because 74327421 - 2¹ = 74327419 is a prime.

It is a super-2 number, since 2×74327421² = 11049131025022482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74337421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76461 + ... + 77426.

It is an arithmetic number, because the mean of its divisors is an integer number (7386624).

Almost surely, 2^74327421 is an apocalyptic number.

It is an amenable number.

74327421 is a deficient number, since it is larger than the sum of its proper divisors (43858563).

74327421 is a wasteful number, since it uses less digits than its factorization.

74327421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153920.

The product of its digits is 9408, while the sum is 30.

The square root of 74327421 is about 8621.3352214144. The cubic root of 74327421 is about 420.4519341641.

Adding to 74327421 its reverse (12472347), we get a palindrome (86799768).

The spelling of 74327421 in words is "seventy-four million, three hundred twenty-seven thousand, four hundred twenty-one".