742130731 has 8 divisors (see below), whose sum is σ = 766700928. Its totient is φ = 717600000.

The previous prime is 742130693. The next prime is 742130737. The reversal of 742130731 is 137031247.

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

It is a cyclic number.

It is not a de Polignac number, because 742130731 - 2¹⁹ = 741606443 is a prime.

It is a super-2 number, since 2×742130731² = 1101516043789188722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 742130731.

It is not an unprimeable number, because it can be changed into a prime (742130737) 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, 31131 + ... + 49531.

It is an arithmetic number, because the mean of its divisors is an integer number (95837616).

Almost surely, 2^742130731 is an apocalyptic number.

742130731 is a deficient number, since it is larger than the sum of its proper divisors (24570197).

742130731 is a wasteful number, since it uses less digits than its factorization.

742130731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19733.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 742130731 is about 27242.0764810614. The cubic root of 742130731 is about 905.3714706733.

Adding to 742130731 its reverse (137031247), we get a palindrome (879161978).

The spelling of 742130731 in words is "seven hundred forty-two million, one hundred thirty thousand, seven hundred thirty-one".