102540620 has 96 divisors (see below), whose sum is σ = 268090368. Its totient is φ = 32078592.

The previous prime is 102540611. The next prime is 102540623. The reversal of 102540620 is 26045201.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 102540592 and 102540601.

It is not an unprimeable number, because it can be changed into a prime (102540623) 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, 187187 + ... + 187733.

It is an arithmetic number, because the mean of its divisors is an integer number (2792608).

Almost surely, 2^102540620 is an apocalyptic number.

102540620 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 102540620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134045184).

102540620 is an abundant number, since it is smaller than the sum of its proper divisors (165549748).

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

102540620 is a wasteful number, since it uses less digits than its factorization.

102540620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679 (or 677 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 102540620 is about 10126.2342457599. The cubic root of 102540620 is about 468.0568940012.

Adding to 102540620 its reverse (26045201), we get a palindrome (128585821).

The spelling of 102540620 in words is "one hundred two million, five hundred forty thousand, six hundred twenty".