742815431 has 8 divisors (see below), whose sum is σ = 782844720. Its totient is φ = 702879552.

The previous prime is 742815379. The next prime is 742815443. The reversal of 742815431 is 134518247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742815431 is a prime.

It is a super-2 number, since 2×742815431² = 1103549529063431522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 742815391 and 742815400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742815461) 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, 6710 + ... + 39123.

It is an arithmetic number, because the mean of its divisors is an integer number (97855590).

Almost surely, 2^742815431 is an apocalyptic number.

742815431 is a deficient number, since it is larger than the sum of its proper divisors (40029289).

742815431 is a wasteful number, since it uses less digits than its factorization.

742815431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46705.

The product of its digits is 26880, while the sum is 35.

The square root of 742815431 is about 27254.6405406492. The cubic root of 742815431 is about 905.6498211366.

The spelling of 742815431 in words is "seven hundred forty-two million, eight hundred fifteen thousand, four hundred thirty-one".