202102140 has 96 divisors (see below), whose sum is σ = 591413760. Its totient is φ = 51515136.

The previous prime is 202102123. The next prime is 202102141. The reversal of 202102140 is 41201202.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202102141) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130209 + ... + 131751.

It is an arithmetic number, because the mean of its divisors is an integer number (6160560).

Almost surely, 2^202102140 is an apocalyptic number.

202102140 is a gapful number since it is divisible by the number (20) 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 202102140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295706880).

202102140 is an abundant number, since it is smaller than the sum of its proper divisors (389311620).

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

202102140 is a wasteful number, since it uses less digits than its factorization.

202102140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1651 (or 1649 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 202102140 is about 14216.2632220988. The cubic root of 202102140 is about 586.8453090326.

Adding to 202102140 its reverse (41201202), we get a palindrome (243303342).

The spelling of 202102140 in words is "two hundred two million, one hundred two thousand, one hundred forty".