1125540143 has 12 divisors (see below), whose sum is σ = 1410018120. Its totient is φ = 890536752.

The previous prime is 1125540139. The next prime is 1125540197. The reversal of 1125540143 is 3410455211.

It is not a de Polignac number, because 1125540143 - 2² = 1125540139 is a prime.

It is a super-2 number, since 2×1125540143² = 2533681227008920898, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125540103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 882833 + ... + 884106.

It is an arithmetic number, because the mean of its divisors is an integer number (117501510).

Almost surely, 2^1125540143 is an apocalyptic number.

1125540143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1125540143 is a deficient number, since it is larger than the sum of its proper divisors (284477977).

1125540143 is a wasteful number, since it uses less digits than its factorization.

1125540143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766966 (or 1766959 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 1125540143 is about 33549.0706726729. The cubic root of 1125540143 is about 1040.2083356667.

Adding to 1125540143 its reverse (3410455211), we get a palindrome (4535995354).

The spelling of 1125540143 in words is "one billion, one hundred twenty-five million, five hundred forty thousand, one hundred forty-three".