74545431 has 8 divisors (see below), whose sum is σ = 101508864. Its totient is φ = 48639480.

The previous prime is 74545381. The next prime is 74545439. The reversal of 74545431 is 13454547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74545431 - 2¹⁷ = 74414359 is a prime.

It is a super-2 number, since 2×74545431² = 11114042565951522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 74545392 and 74545401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74545439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 264205 + ... + 264486.

It is an arithmetic number, because the mean of its divisors is an integer number (12688608).

Almost surely, 2^74545431 is an apocalyptic number.

74545431 is a deficient number, since it is larger than the sum of its proper divisors (26963433).

74545431 is a wasteful number, since it uses less digits than its factorization.

74545431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528741.

The product of its digits is 33600, while the sum is 33.

The square root of 74545431 is about 8633.9695968888. The cubic root of 74545431 is about 420.8626092193.

Adding to 74545431 its reverse (13454547), we get a palindrome (87999978).

The spelling of 74545431 in words is "seventy-four million, five hundred forty-five thousand, four hundred thirty-one".