742342431 has 4 divisors (see below), whose sum is σ = 989789912. Its totient is φ = 494894952.

The previous prime is 742342423. The next prime is 742342459. The reversal of 742342431 is 134243247.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 742342431 - 2³ = 742342423 is a prime.

It is a super-2 number, since 2×742342431² = 1102144569725979522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742342421) 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, 123723736 + ... + 123723741.

It is an arithmetic number, because the mean of its divisors is an integer number (247447478).

Almost surely, 2^742342431 is an apocalyptic number.

742342431 is a deficient number, since it is larger than the sum of its proper divisors (247447481).

742342431 is a wasteful number, since it uses less digits than its factorization.

742342431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247447480.

The product of its digits is 16128, while the sum is 30.

The square root of 742342431 is about 27245.9617374759. The cubic root of 742342431 is about 905.4575511576.

Adding to 742342431 its reverse (134243247), we get a palindrome (876585678).

The spelling of 742342431 in words is "seven hundred forty-two million, three hundred forty-two thousand, four hundred thirty-one".