1131625605 has 32 divisors (see below), whose sum is σ = 2008696320. Its totient is φ = 539362880.

The previous prime is 1131625603. The next prime is 1131625613. The reversal of 1131625605 is 5065261311.

It is not a de Polignac number, because 1131625605 - 2¹ = 1131625603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131625601) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 48387 + ... + 67856.

It is an arithmetic number, because the mean of its divisors is an integer number (62771760).

Almost surely, 2^1131625605 is an apocalyptic number.

1131625605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1131625605 is a deficient number, since it is larger than the sum of its proper divisors (877070715).

1131625605 is a wasteful number, since it uses less digits than its factorization.

1131625605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116321.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1131625605 is about 33639.6433542331. The cubic root of 1131625605 is about 1042.0796665327.

Adding to 1131625605 its reverse (5065261311), we get a palindrome (6196886916).

The spelling of 1131625605 in words is "one billion, one hundred thirty-one million, six hundred twenty-five thousand, six hundred five".