1126078549 has 4 divisors (see below), whose sum is σ = 1128372480. Its totient is φ = 1123784620.

The previous prime is 1126078517. The next prime is 1126078559. The reversal of 1126078549 is 9458706211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9458706211 = 17 ⋅556394483.

It is a cyclic number.

It is not a de Polignac number, because 1126078549 - 2⁵ = 1126078517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1126078559) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1146229 + ... + 1147210.

It is an arithmetic number, because the mean of its divisors is an integer number (282093120).

Almost surely, 2^1126078549 is an apocalyptic number.

It is an amenable number.

1126078549 is a deficient number, since it is larger than the sum of its proper divisors (2293931).

1126078549 is an equidigital number, since it uses as much as digits as its factorization.

1126078549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2293930.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 1126078549 is about 33557.0938700001. The cubic root of 1126078549 is about 1040.3741716389.

The spelling of 1126078549 in words is "one billion, one hundred twenty-six million, seventy-eight thousand, five hundred forty-nine".