1478731 has 4 divisors (see below), whose sum is σ = 1526464. Its totient is φ = 1431000.

The previous prime is 1478723. The next prime is 1478759. The reversal of 1478731 is 1378741.

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 1478731 - 2³ = 1478723 is a prime.

It is a super-2 number, since 2×1478731² = 4373290740722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 47701 = 1478731 / (1 + 4 + 7 + 8 + 7 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1478693 and 1478702.

It is not an unprimeable number, because it can be changed into a prime (1478231) 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, 23820 + ... + 23881.

It is an arithmetic number, because the mean of its divisors is an integer number (381616).

2^1478731 is an apocalyptic number.

1478731 is a deficient number, since it is larger than the sum of its proper divisors (47733).

1478731 is an equidigital number, since it uses as much as digits as its factorization.

1478731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47732.

The product of its digits is 4704, while the sum is 31.

The square root of 1478731 is about 1216.0308384247. The cubic root of 1478731 is about 113.9278038827.

It can be divided in two parts, 1478 and 731, that added together give a square (2209 = 47²).

The spelling of 1478731 in words is "one million, four hundred seventy-eight thousand, seven hundred thirty-one".