1125530015 has 4 divisors (see below), whose sum is σ = 1350636024. Its totient is φ = 900424008.

The previous prime is 1125529981. The next prime is 1125530053. The reversal of 1125530015 is 5100355211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5100355211 = 7 ⋅728622173.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125530015 is a prime.

It is a Duffinian number.

It is a congruent 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, 112552997 + ... + 112553006.

It is an arithmetic number, because the mean of its divisors is an integer number (337659006).

Almost surely, 2^1125530015 is an apocalyptic number.

1125530015 is a deficient number, since it is larger than the sum of its proper divisors (225106009).

1125530015 is an equidigital number, since it uses as much as digits as its factorization.

1125530015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225106008.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 1125530015 is about 33548.9197292551. The cubic root of 1125530015 is about 1040.2052156057.

Adding to 1125530015 its reverse (5100355211), we get a palindrome (6225885226).

It can be divided in two parts, 11255300 and 15, that multiplied together give a triangular number (168829500 = T₁₈₃₇₅).

The spelling of 1125530015 in words is "one billion, one hundred twenty-five million, five hundred thirty thousand, fifteen".