1243431026 has 16 divisors (see below), whose sum is σ = 1911674520. Its totient is φ = 606222720.

The previous prime is 1243431019. The next prime is 1243431029. The reversal of 1243431026 is 6201343421.

It can be written as a sum of positive squares in 4 ways, for example, as 872907025 + 370524001 = 29545^2 + 19249^2 .

It is a super-2 number, since 2×1243431026² = 3092241432838825352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1243430986 and 1243431004.

It is not an unprimeable number, because it can be changed into a prime (1243431029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225980 + ... + 231416.

Almost surely, 2^1243431026 is an apocalyptic number.

1243431026 is a deficient number, since it is larger than the sum of its proper divisors (668243494).

1243431026 is a wasteful number, since it uses less digits than its factorization.

1243431026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8269.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 1243431026 is about 35262.3173657092. The cubic root of 1243431026 is about 1075.3270397794.

Adding to 1243431026 its reverse (6201343421), we get a palindrome (7444774447).

The spelling of 1243431026 in words is "one billion, two hundred forty-three million, four hundred thirty-one thousand, twenty-six".