1125281937 has 12 divisors (see below), whose sum is σ = 1624668144. Its totient is φ = 692480880.

The previous prime is 1125281891. The next prime is 1125281939. The reversal of 1125281937 is 7391825211.

It is a happy number.

It is not a de Polignac number, because 1125281937 - 2¹⁰ = 1125280913 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 1125281895 and 1125281904.

It is not an unprimeable number, because it can be changed into a prime (1125281939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109239 + ... + 1110252.

It is an arithmetic number, because the mean of its divisors is an integer number (135389012).

Almost surely, 2^1125281937 is an apocalyptic number.

It is an amenable number.

1125281937 is a deficient number, since it is larger than the sum of its proper divisors (499386207).

1125281937 is a wasteful number, since it uses less digits than its factorization.

1125281937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219520 (or 2219507 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 1125281937 is about 33545.2222678581. Note that the first 4 decimals coincide. The cubic root of 1125281937 is about 1040.1287861347.

The spelling of 1125281937 in words is "one billion, one hundred twenty-five million, two hundred eighty-one thousand, nine hundred thirty-seven".