1125220513 has 8 divisors (see below), whose sum is σ = 1185545088. Its totient is φ = 1065846144.

The previous prime is 1125220507. The next prime is 1125220519. The reversal of 1125220513 is 3150225211.

It is an interprime number because it is at equal distance from previous prime (1125220507) and next prime (1125220519).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1125220513 is a prime.

It is a super-2 number, since 2×1125220513² = 2532242405751966338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125220519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235120 + ... + 239857.

It is an arithmetic number, because the mean of its divisors is an integer number (148193136).

Almost surely, 2^1125220513 is an apocalyptic number.

It is an amenable number.

1125220513 is a deficient number, since it is larger than the sum of its proper divisors (60324575).

1125220513 is a wasteful number, since it uses less digits than its factorization.

1125220513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475103.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1125220513 is about 33544.3067151491. The cubic root of 1125220513 is about 1040.1098604975.

Adding to 1125220513 its reverse (3150225211), we get a palindrome (4275445724).

The spelling of 1125220513 in words is "one billion, one hundred twenty-five million, two hundred twenty thousand, five hundred thirteen".