10021140 has 36 divisors (see below), whose sum is σ = 30398004. Its totient is φ = 2672256.

The previous prime is 10021129. The next prime is 10021147. The reversal of 10021140 is 4112001.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 6380676 + 3640464 = 2526^2 + 1908^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021147) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27657 + ... + 28016.

It is an arithmetic number, because the mean of its divisors is an integer number (844389).

Almost surely, 2^10021140 is an apocalyptic number.

10021140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10021140 is an abundant number, since it is smaller than the sum of its proper divisors (20376864).

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

10021140 is a wasteful number, since it uses less digits than its factorization.

10021140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55688 (or 55683 counting only the distinct ones).

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

The square root of 10021140 is about 3165.6184229942. The cubic root of 10021140 is about 215.5951779803.

Adding to 10021140 its reverse (4112001), we get a palindrome (14133141).

The spelling of 10021140 in words is "ten million, twenty-one thousand, one hundred forty".