731642 has 8 divisors (see below), whose sum is σ = 1101600. Its totient is φ = 364444.

The previous prime is 731639. The next prime is 731651. The reversal of 731642 is 246137.

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

It is a plaindrome in base 9.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209 + ... + 1227.

It is an arithmetic number, because the mean of its divisors is an integer number (137700).

2⁷³¹⁶⁴² is an apocalyptic number.

731642 is a deficient number, since it is larger than the sum of its proper divisors (369958).

731642 is a wasteful number, since it uses less digits than its factorization.

731642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380.

The product of its digits is 1008, while the sum is 23.

The square root of 731642 is about 855.3607426110. The cubic root of 731642 is about 90.1085931995.

Adding to 731642 its reverse (246137), we get a palindrome (977779).

The spelling of 731642 in words is "seven hundred thirty-one thousand, six hundred forty-two".