102840252 has 12 divisors (see below), whose sum is σ = 239960616. Its totient is φ = 34280080.

The previous prime is 102840251. The next prime is 102840253. The reversal of 102840252 is 252048201.

It is an interprime number because it is at equal distance from previous prime (102840251) and next prime (102840253).

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×102840252² = 21152234862847008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102840251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4284999 + ... + 4285022.

It is an arithmetic number, because the mean of its divisors is an integer number (19996718).

Almost surely, 2^102840252 is an apocalyptic number.

102840252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

102840252 is an abundant number, since it is smaller than the sum of its proper divisors (137120364).

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

102840252 is a wasteful number, since it uses less digits than its factorization.

102840252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8570028 (or 8570026 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 102840252 is about 10141.0182920652. The cubic root of 102840252 is about 468.5123507179.

Adding to 102840252 its reverse (252048201), we get a palindrome (354888453).

The spelling of 102840252 in words is "one hundred two million, eight hundred forty thousand, two hundred fifty-two".