1021125740 has 96 divisors (see below), whose sum is σ = 2467584000. Its totient is φ = 352373760.

The previous prime is 1021125691. The next prime is 1021125767. The reversal of 1021125740 is 475211201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197711 + ... + 202809.

It is an arithmetic number, because the mean of its divisors is an integer number (25704000).

Almost surely, 2^1021125740 is an apocalyptic number.

1021125740 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 1021125740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1233792000).

1021125740 is an abundant number, since it is smaller than the sum of its proper divisors (1446458260).

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

1021125740 is a wasteful number, since it uses less digits than its factorization.

1021125740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5175 (or 5173 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 1021125740 is about 31955.0581285655. The cubic root of 1021125740 is about 1006.9928987152.

Adding to 1021125740 its reverse (475211201), we get a palindrome (1496336941).

The spelling of 1021125740 in words is "one billion, twenty-one million, one hundred twenty-five thousand, seven hundred forty".