1243431 has 48 divisors (see below), whose sum is σ = 2306304. Its totient is φ = 653184.

The previous prime is 1243427. The next prime is 1243439. The reversal of 1243431 is 1343421.

It is not a de Polignac number, because 1243431 - 2² = 1243427 is a prime.

It is a super-2 number, since 2×1243431² = 3092241303522, which contains 22 as substring.

1243431 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243439) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28896 + ... + 28938.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2^1243431 is an apocalyptic number.

1243431 is a deficient number, since it is larger than the sum of its proper divisors (1062873).

1243431 is an equidigital number, since it uses as much as digits as its factorization.

1243431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 70 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 1243431 is about 1115.0923728553. The cubic root of 1243431 is about 107.5327032284.

Adding to 1243431 its reverse (1343421), we get a palindrome (2586852).

The spelling of 1243431 in words is "one million, two hundred forty-three thousand, four hundred thirty-one".