731427 has 4 divisors (see below), whose sum is σ = 975240. Its totient is φ = 487616.

The previous prime is 731413. The next prime is 731447. The reversal of 731427 is 724137.

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

It is a cyclic number.

It is not a de Polignac number, because 731427 - 2⁶ = 731363 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 731397 and 731406.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 731427.

It is not an unprimeable number, because it can be changed into a prime (731447) 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, 121902 + ... + 121907.

It is an arithmetic number, because the mean of its divisors is an integer number (243810).

2⁷³¹⁴²⁷ is an apocalyptic number.

731427 is a deficient number, since it is larger than the sum of its proper divisors (243813).

731427 is a wasteful number, since it uses less digits than its factorization.

731427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243812.

The product of its digits is 1176, while the sum is 24.

The square root of 731427 is about 855.2350554087. The cubic root of 731427 is about 90.0997659108.

The spelling of 731427 in words is "seven hundred thirty-one thousand, four hundred twenty-seven".