1405231403 has 4 divisors (see below), whose sum is σ = 1407320088. Its totient is φ = 1403142720.

The previous prime is 1405231363. The next prime is 1405231411. The reversal of 1405231403 is 3041325041.

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 1405231403 - 2²⁰ = 1404182827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1405231423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043333 + ... + 1044678.

It is an arithmetic number, because the mean of its divisors is an integer number (351830022).

Almost surely, 2^1405231403 is an apocalyptic number.

1405231403 is a deficient number, since it is larger than the sum of its proper divisors (2088685).

1405231403 is an equidigital number, since it uses as much as digits as its factorization.

1405231403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088684.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1405231403 is about 37486.4162464218. The cubic root of 1405231403 is about 1120.0806178683.

Adding to 1405231403 its reverse (3041325041), we get a palindrome (4446556444).

The spelling of 1405231403 in words is "one billion, four hundred five million, two hundred thirty-one thousand, four hundred three".