102581540 has 12 divisors (see below), whose sum is σ = 215421276. Its totient is φ = 41032608.

The previous prime is 102581533. The next prime is 102581603. The reversal of 102581540 is 45185201.

It can be written as a sum of positive squares in 2 ways, for example, as 47554816 + 55026724 = 6896^2 + 7418^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2564519 + ... + 2564558.

It is an arithmetic number, because the mean of its divisors is an integer number (17951773).

Almost surely, 2^102581540 is an apocalyptic number.

102581540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102581540 is an abundant number, since it is smaller than the sum of its proper divisors (112839736).

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

102581540 is a wasteful number, since it uses less digits than its factorization.

102581540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5129086 (or 5129084 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 102581540 is about 10128.2545386656. The cubic root of 102581540 is about 468.1191468624.

The spelling of 102581540 in words is "one hundred two million, five hundred eighty-one thousand, five hundred forty".