1021023140 has 96 divisors (see below), whose sum is σ = 2344204800. Its totient is φ = 372211200.

The previous prime is 1021023131. The next prime is 1021023149. The reversal of 1021023140 is 413201201.

It is an interprime number because it is at equal distance from previous prime (1021023131) and next prime (1021023149).

It is not an unprimeable number, because it can be changed into a prime (1021023149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1419701 + ... + 1420419.

It is an arithmetic number, because the mean of its divisors is an integer number (24418800).

Almost surely, 2^1021023140 is an apocalyptic number.

1021023140 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 1021023140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1172102400).

1021023140 is an abundant number, since it is smaller than the sum of its proper divisors (1323181660).

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

1021023140 is a wasteful number, since it uses less digits than its factorization.

1021023140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 883 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1021023140 is about 31953.4527085885. The cubic root of 1021023140 is about 1006.9591709290.

Adding to 1021023140 its reverse (413201201), we get a palindrome (1434224341).

The spelling of 1021023140 in words is "one billion, twenty-one million, twenty-three thousand, one hundred forty".