1231052405 has 16 divisors (see below), whose sum is σ = 1638878400. Its totient is φ = 880133760.

The previous prime is 1231052371. The next prime is 1231052411. The reversal of 1231052405 is 5042501321.

It is not a de Polignac number, because 1231052405 - 2⁸ = 1231052149 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 186440 + ... + 192929.

It is an arithmetic number, because the mean of its divisors is an integer number (102429900).

Almost surely, 2^1231052405 is an apocalyptic number.

It is an amenable number.

1231052405 is a deficient number, since it is larger than the sum of its proper divisors (407825995).

1231052405 is a wasteful number, since it uses less digits than its factorization.

1231052405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379444.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1231052405 is about 35086.3563939033. The cubic root of 1231052405 is about 1071.7467625657.

Adding to 1231052405 its reverse (5042501321), we get a palindrome (6273553726).

The spelling of 1231052405 in words is "one billion, two hundred thirty-one million, fifty-two thousand, four hundred five".