1131265510 has 32 divisors (see below), whose sum is σ = 2269542240. Its totient is φ = 403471872.

The previous prime is 1131265489. The next prime is 1131265517. The reversal of 1131265510 is 155621311.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131265517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171889 + ... + 178348.

It is an arithmetic number, because the mean of its divisors is an integer number (70923195).

Almost surely, 2^1131265510 is an apocalyptic number.

1131265510 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1131265510 is an abundant number, since it is smaller than the sum of its proper divisors (1138276730).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1131265510 is a wasteful number, since it uses less digits than its factorization.

1131265510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350280.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1131265510 is about 33634.2906867381. The cubic root of 1131265510 is about 1041.9691212883.

Adding to 1131265510 its reverse (155621311), we get a palindrome (1286886821).

The spelling of 1131265510 in words is "one billion, one hundred thirty-one million, two hundred sixty-five thousand, five hundred ten".