1242431 has 4 divisors (see below), whose sum is σ = 1244664. Its totient is φ = 1240200.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242431 is 1342421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1342421 = 571 ⋅2351.

It is a cyclic number.

It is not a de Polignac number, because 1242431 - 2¹⁰ = 1241407 is a prime.

It is a super-2 number, since 2×1242431² = 3087269579522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242421) 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, 476 + ... + 1646.

It is an arithmetic number, because the mean of its divisors is an integer number (311166).

2^1242431 is an apocalyptic number.

1242431 is a deficient number, since it is larger than the sum of its proper divisors (2233).

1242431 is a wasteful number, since it uses less digits than its factorization.

1242431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2232.

The product of its digits is 192, while the sum is 17.

The square root of 1242431 is about 1114.6438893207. The cubic root of 1242431 is about 107.5038686187.

Adding to 1242431 its reverse (1342421), we get a palindrome (2584852).

The spelling of 1242431 in words is "one million, two hundred forty-two thousand, four hundred thirty-one".