1125087917 has 4 divisors (see below), whose sum is σ = 1126041756. Its totient is φ = 1124134080.

The previous prime is 1125087889. The next prime is 1125087937. The reversal of 1125087917 is 7197805211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7197805211 = 227 ⋅31708393.

It can be written as a sum of positive squares in 2 ways, for example, as 1098193321 + 26894596 = 33139^2 + 5186^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125087917 - 2¹⁸ = 1124825773 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 (1125087937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475148 + ... + 477509.

It is an arithmetic number, because the mean of its divisors is an integer number (281510439).

Almost surely, 2^1125087917 is an apocalyptic number.

It is an amenable number.

1125087917 is a deficient number, since it is larger than the sum of its proper divisors (953839).

1125087917 is an equidigital number, since it uses as much as digits as its factorization.

1125087917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953838.

The product of its (nonzero) digits is 35280, while the sum is 41.

The square root of 1125087917 is about 33542.3302261486. The cubic root of 1125087917 is about 1040.0690033728.

The spelling of 1125087917 in words is "one billion, one hundred twenty-five million, eighty-seven thousand, nine hundred seventeen".