1021000140 has 60 divisors (see below), whose sum is σ = 3202920336. Its totient is φ = 272266272.

The previous prime is 1021000139. The next prime is 1021000157. The reversal of 1021000140 is 410001201.

It is a happy number.

1021000140 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 313504 + ... + 316743.

Almost surely, 2^1021000140 is an apocalyptic number.

1021000140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021000140 is an abundant number, since it is smaller than the sum of its proper divisors (2181920196).

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

1021000140 is a wasteful number, since it uses less digits than its factorization.

1021000140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630268 (or 630257 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1021000140 is about 31953.0928080522. The cubic root of 1021000140 is about 1006.9516098092.

Adding to 1021000140 its reverse (410001201), we get a palindrome (1431001341).

The spelling of 1021000140 in words is "one billion, twenty-one million, one hundred forty", and thus it is an aban number.