1125400240 has 40 divisors (see below), whose sum is σ = 2617957440. Its totient is φ = 449918976.

The previous prime is 1125400231. The next prime is 1125400247. The reversal of 1125400240 is 420045211.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1125400247) 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, 270496 + ... + 274624.

It is an arithmetic number, because the mean of its divisors is an integer number (65448936).

Almost surely, 2^1125400240 is an apocalyptic number.

1125400240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125400240 is an abundant number, since it is smaller than the sum of its proper divisors (1492557200).

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

1125400240 is a wasteful number, since it uses less digits than its factorization.

1125400240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7549 (or 7543 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 1125400240 is about 33546.9855575728. The cubic root of 1125400240 is about 1040.1652350873.

Adding to 1125400240 its reverse (420045211), we get a palindrome (1545445451).

The spelling of 1125400240 in words is "one billion, one hundred twenty-five million, four hundred thousand, two hundred forty".