1125201420 has 144 divisors (see below), whose sum is σ = 4026667008. Its totient is φ = 248883840.

The previous prime is 1125201409. The next prime is 1125201433. The reversal of 1125201420 is 241025211.

1125201420 is a `hidden beast` number, since 1 + 1 + 2 + 520 + 142 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1125201393 and 1125201402.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 24657 + ... + 53463.

Almost surely, 2^1125201420 is an apocalyptic number.

1125201420 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 1125201420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013333504).

1125201420 is an abundant number, since it is smaller than the sum of its proper divisors (2901465588).

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

1125201420 is a wasteful number, since it uses less digits than its factorization.

1125201420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28860 (or 28855 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1125201420 is about 33544.0221201930. The cubic root of 1125201420 is about 1040.1039775233.

Adding to 1125201420 its reverse (241025211), we get a palindrome (1366226631).

The spelling of 1125201420 in words is "one billion, one hundred twenty-five million, two hundred one thousand, four hundred twenty".