1125601280 has 208 divisors, whose sum is σ = 2961734544. Its totient is φ = 408944640.

The previous prime is 1125601277. The next prime is 1125601291. The reversal of 1125601280 is 821065211.

It can be written as a sum of positive squares in 8 ways, for example, as 13778944 + 1111822336 = 3712^2 + 33344^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18452450 + ... + 18452510.

Almost surely, 2^1125601280 is an apocalyptic number.

1125601280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1125601280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1480867272).

1125601280 is an abundant number, since it is smaller than the sum of its proper divisors (1836133264).

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

1125601280 is an equidigital number, since it uses as much as digits as its factorization.

1125601280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 26.

The square root of 1125601280 is about 33549.9818181769. The cubic root of 1125601280 is about 1040.2271693102.

Adding to 1125601280 its reverse (821065211), we get a palindrome (1946666491).

The spelling of 1125601280 in words is "one billion, one hundred twenty-five million, six hundred one thousand, two hundred eighty".