1125142020 has 144 divisors (see below), whose sum is σ = 3475180800. Its totient is φ = 294624000.

The previous prime is 1125142013. The next prime is 1125142079. The reversal of 1125142020 is 202415211.

1125142020 is a `hidden beast` number, since 112 + 514 + 20 + 20 = 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 = 1125141984 and 1125142002.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3617665 + ... + 3617975.

It is an arithmetic number, because the mean of its divisors is an integer number (24133200).

Almost surely, 2^1125142020 is an apocalyptic number.

1125142020 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 1125142020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737590400).

1125142020 is an abundant number, since it is smaller than the sum of its proper divisors (2350038780).

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

1125142020 is a wasteful number, since it uses less digits than its factorization.

1125142020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 621 counting only the distinct ones).

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

The square root of 1125142020 is about 33543.1367048462. The cubic root of 1125142020 is about 1040.0856746481.

Adding to 1125142020 its reverse (202415211), we get a palindrome (1327557231).

The spelling of 1125142020 in words is "one billion, one hundred twenty-five million, one hundred forty-two thousand, twenty".