1431231 has 4 divisors (see below), whose sum is σ = 1908312. Its totient is φ = 954152.

The previous prime is 1431223. The next prime is 1431253. The reversal of 1431231 is 1321341.

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 1431231 - 2³ = 1431223 is a prime.

It is a super-2 number, since 2×1431231² = 4096844350722, which contains 22 as substring.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 1431231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1431211) 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, 238536 + ... + 238541.

It is an arithmetic number, because the mean of its divisors is an integer number (477078).

2^1431231 is an apocalyptic number.

1431231 is a deficient number, since it is larger than the sum of its proper divisors (477081).

1431231 is an equidigital number, since it uses as much as digits as its factorization.

1431231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477080.

The product of its digits is 72, while the sum is 15.

The square root of 1431231 is about 1196.3406705450. The cubic root of 1431231 is about 112.6946359063.

Adding to 1431231 its reverse (1321341), we get a palindrome (2752572).

The spelling of 1431231 in words is "one million, four hundred thirty-one thousand, two hundred thirty-one".