1125213530 has 16 divisors (see below), whose sum is σ = 2314725120. Its totient is φ = 385787472.

The previous prime is 1125213517. The next prime is 1125213533. The reversal of 1125213530 is 353125211.

It is a happy number.

It is a super-2 number, since 2×1125213530² = 2532210976190121800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1125213496 and 1125213505.

It is not an unprimeable number, because it can be changed into a prime (1125213533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8037170 + ... + 8037309.

It is an arithmetic number, because the mean of its divisors is an integer number (144670320).

Almost surely, 2^1125213530 is an apocalyptic number.

1125213530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125213530 is an abundant number, since it is smaller than the sum of its proper divisors (1189511590).

1125213530 is a wasteful number, since it uses less digits than its factorization.

1125213530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16074493.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 1125213530 is about 33544.2026287703. The cubic root of 1125213530 is about 1040.1077088890.

Adding to 1125213530 its reverse (353125211), we get a palindrome (1478338741).

The spelling of 1125213530 in words is "one billion, one hundred twenty-five million, two hundred thirteen thousand, five hundred thirty".