1125211530 has 32 divisors (see below), whose sum is σ = 2763313344. Its totient is φ = 293078016.

The previous prime is 1125211517. The next prime is 1125211541. The reversal of 1125211530 is 351125211.

It is a super-2 number, since 2×1125211530² = 2532201974489881800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1125211497 and 1125211506.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 434839 + ... + 437418.

It is an arithmetic number, because the mean of its divisors is an integer number (86353542).

Almost surely, 2^1125211530 is an apocalyptic number.

1125211530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1125211530 is an abundant number, since it is smaller than the sum of its proper divisors (1638101814).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1125211530 is a wasteful number, since it uses less digits than its factorization.

1125211530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 872310.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1125211530 is about 33544.1728173464. The cubic root of 1125211530 is about 1040.1070926455.

Adding to 1125211530 its reverse (351125211), we get a palindrome (1476336741).

The spelling of 1125211530 in words is "one billion, one hundred twenty-five million, two hundred eleven thousand, five hundred thirty".