1298431 has 4 divisors (see below), whose sum is σ = 1303632. Its totient is φ = 1293232.

The previous prime is 1298387. The next prime is 1298467. The reversal of 1298431 is 1348921.

It is a happy number.

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 1298431 - 2¹⁷ = 1167359 is a prime.

It is a super-2 number, since 2×1298431² = 3371846123522, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1298431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2206 + ... + 2731.

It is an arithmetic number, because the mean of its divisors is an integer number (325908).

2^1298431 is an apocalyptic number.

1298431 is a deficient number, since it is larger than the sum of its proper divisors (5201).

1298431 is an equidigital number, since it uses as much as digits as its factorization.

1298431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5200.

The product of its digits is 1728, while the sum is 28.

The square root of 1298431 is about 1139.4871653512. The cubic root of 1298431 is about 109.0953630547.

The spelling of 1298431 in words is "one million, two hundred ninety-eight thousand, four hundred thirty-one".