1240431 has 4 divisors (see below), whose sum is σ = 1653912. Its totient is φ = 826952.

The previous prime is 1240423. The next prime is 1240483. The reversal of 1240431 is 1340421.

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 1240431 - 2³ = 1240423 is a prime.

It is a super-2 number, since 2×1240431² = 3077338131522, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 1240431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240231) 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, 206736 + ... + 206741.

It is an arithmetic number, because the mean of its divisors is an integer number (413478).

2^1240431 is an apocalyptic number.

1240431 is a deficient number, since it is larger than the sum of its proper divisors (413481).

1240431 is an equidigital number, since it uses as much as digits as its factorization.

1240431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413480.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 1240431 is about 1113.7463804655. The cubic root of 1240431 is about 107.4461529494.

Adding to 1240431 its reverse (1340421), we get a palindrome (2580852).

The spelling of 1240431 in words is "one million, two hundred forty thousand, four hundred thirty-one".