1230731 has 12 divisors (see below), whose sum is σ = 1350720. Its totient is φ = 1118880.

The previous prime is 1230727. The next prime is 1230739. The reversal of 1230731 is 1370321.

It is not a de Polignac number, because 1230731 - 2² = 1230727 is a prime.

It is a super-2 number, since 2×1230731² = 3029397588722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1230739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33245 + ... + 33281.

It is an arithmetic number, because the mean of its divisors is an integer number (112560).

2^1230731 is an apocalyptic number.

1230731 is a deficient number, since it is larger than the sum of its proper divisors (119989).

1230731 is an equidigital number, since it uses as much as digits as its factorization.

1230731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 97 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 17.

The square root of 1230731 is about 1109.3831619418. The cubic root of 1230731 is about 107.1653483366.

The spelling of 1230731 in words is "one million, two hundred thirty thousand, seven hundred thirty-one".