1131252405 has 32 divisors (see below), whose sum is σ = 1847857536. Its totient is φ = 590763264.

The previous prime is 1131252377. The next prime is 1131252413. The reversal of 1131252405 is 5042521311.

It is a happy number.

It is not a de Polignac number, because 1131252405 - 2⁷ = 1131252277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 510079 + ... + 512291.

It is an arithmetic number, because the mean of its divisors is an integer number (57745548).

Almost surely, 2^1131252405 is an apocalyptic number.

1131252405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131252405 is a deficient number, since it is larger than the sum of its proper divisors (716605131).

1131252405 is a wasteful number, since it uses less digits than its factorization.

1131252405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 1131252405 is about 33634.0958701137. The cubic root of 1131252405 is about 1041.9650977536.

Adding to 1131252405 its reverse (5042521311), we get a palindrome (6173773716).

The spelling of 1131252405 in words is "one billion, one hundred thirty-one million, two hundred fifty-two thousand, four hundred five".