1229431 has 4 divisors (see below), whose sum is σ = 1405072. Its totient is φ = 1053792.

The previous prime is 1229401. The next prime is 1229443. The reversal of 1229431 is 1349221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1349221 = 53 ⋅25457.

It is a cyclic number.

It is not a de Polignac number, because 1229431 - 2⁹ = 1228919 is a prime.

It is a super-2 number, since 2×1229431² = 3023001167522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1229401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87810 + ... + 87823.

It is an arithmetic number, because the mean of its divisors is an integer number (351268).

2^1229431 is an apocalyptic number.

1229431 is a deficient number, since it is larger than the sum of its proper divisors (175641).

1229431 is an equidigital number, since it uses as much as digits as its factorization.

1229431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175640.

The product of its digits is 432, while the sum is 22.

The square root of 1229431 is about 1108.7970959558. The cubic root of 1229431 is about 107.1276027383.

The spelling of 1229431 in words is "one million, two hundred twenty-nine thousand, four hundred thirty-one".