1131400265 has 8 divisors (see below), whose sum is σ = 1376803008. Its totient is φ = 892371760.

The previous prime is 1131400261. The next prime is 1131400297. The reversal of 1131400265 is 5620041311.

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

It is not a de Polignac number, because 1131400265 - 2² = 1131400261 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1131400265.

It is not an unprimeable number, because it can be changed into a prime (1131400261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1593167 + ... + 1593876.

It is an arithmetic number, because the mean of its divisors is an integer number (172100376).

Almost surely, 2^1131400265 is an apocalyptic number.

It is an amenable number.

1131400265 is a deficient number, since it is larger than the sum of its proper divisors (245402743).

1131400265 is an equidigital number, since it uses as much as digits as its factorization.

1131400265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187119.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 1131400265 is about 33636.2938654068. The cubic root of 1131400265 is about 1042.0104923525.

Adding to 1131400265 its reverse (5620041311), we get a palindrome (6751441576).

The spelling of 1131400265 in words is "one billion, one hundred thirty-one million, four hundred thousand, two hundred sixty-five".