1231426345 has 8 divisors (see below), whose sum is σ = 1479126600. Its totient is φ = 984197760.

The previous prime is 1231426321. The next prime is 1231426351. The reversal of 1231426345 is 5436241321.

It can be written as a sum of positive squares in 4 ways, for example, as 161874729 + 1069551616 = 12723^2 + 32704^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231426345 - 2¹¹ = 1231424297 is a prime.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 112146 + ... + 122635.

It is an arithmetic number, because the mean of its divisors is an integer number (184890825).

Almost surely, 2^1231426345 is an apocalyptic number.

It is an amenable number.

1231426345 is a deficient number, since it is larger than the sum of its proper divisors (247700255).

1231426345 is a wasteful number, since it uses less digits than its factorization.

1231426345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235835.

The product of its digits is 17280, while the sum is 31.

The square root of 1231426345 is about 35091.6848412840. The cubic root of 1231426345 is about 1071.8552682125.

Adding to 1231426345 its reverse (5436241321), we get a palindrome (6667667666).

The spelling of 1231426345 in words is "one billion, two hundred thirty-one million, four hundred twenty-six thousand, three hundred forty-five".