1126787391 has 24 divisors (see below), whose sum is σ = 1645804160. Its totient is φ = 742810176.

The previous prime is 1126787371. The next prime is 1126787393. The reversal of 1126787391 is 1937876211.

1126787391 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1126787391 - 2⁶ = 1126787327 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126787393) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 718290 + ... + 719856.

Almost surely, 2^1126787391 is an apocalyptic number.

1126787391 is a deficient number, since it is larger than the sum of its proper divisors (519016769).

1126787391 is a wasteful number, since it uses less digits than its factorization.

1126787391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415 (or 2412 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1126787391 is about 33567.6539394698. The cubic root of 1126787391 is about 1040.5924235020.

The spelling of 1126787391 in words is "one billion, one hundred twenty-six million, seven hundred eighty-seven thousand, three hundred ninety-one".