74142231 has 16 divisors (see below), whose sum is σ = 100709856. Its totient is φ = 48508416.

The previous prime is 74142223. The next prime is 74142239. The reversal of 74142231 is 13224147.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74142223) and next prime (74142239).

It is not a de Polignac number, because 74142231 - 2³ = 74142223 is a prime.

It is a super-2 number, since 2×74142231² = 10994140835314722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74142239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50301 + ... + 51753.

It is an arithmetic number, because the mean of its divisors is an integer number (6294366).

Almost surely, 2^74142231 is an apocalyptic number.

74142231 is a deficient number, since it is larger than the sum of its proper divisors (26567625).

74142231 is a wasteful number, since it uses less digits than its factorization.

74142231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its digits is 1344, while the sum is 24.

The square root of 74142231 is about 8610.5883074271. The cubic root of 74142231 is about 420.1024523306.

Adding to 74142231 its reverse (13224147), we get a palindrome (87366378).

The spelling of 74142231 in words is "seventy-four million, one hundred forty-two thousand, two hundred thirty-one".