1126388555 has 4 divisors (see below), whose sum is σ = 1351666272. Its totient is φ = 901110840.

The previous prime is 1126388519. The next prime is 1126388563. The reversal of 1126388555 is 5558836211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5558836211 = 41 ⋅135581371.

It is not a de Polignac number, because 1126388555 - 2¹⁰ = 1126387531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112638851 + ... + 112638860.

It is an arithmetic number, because the mean of its divisors is an integer number (337916568).

Almost surely, 2^1126388555 is an apocalyptic number.

1126388555 is a deficient number, since it is larger than the sum of its proper divisors (225277717).

1126388555 is an equidigital number, since it uses as much as digits as its factorization.

1126388555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225277716.

The product of its digits is 288000, while the sum is 44.

The square root of 1126388555 is about 33561.7126350846. The cubic root of 1126388555 is about 1040.4696334945.

The spelling of 1126388555 in words is "one billion, one hundred twenty-six million, three hundred eighty-eight thousand, five hundred fifty-five".