102061780 has 24 divisors (see below), whose sum is σ = 216915552. Its totient is φ = 40332192.

The previous prime is 102061777. The next prime is 102061789. The reversal of 102061780 is 87160201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102061789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29082 + ... + 32401.

It is an arithmetic number, because the mean of its divisors is an integer number (9038148).

Almost surely, 2^102061780 is an apocalyptic number.

102061780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102061780 is an abundant number, since it is smaller than the sum of its proper divisors (114853772).

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

102061780 is a wasteful number, since it uses less digits than its factorization.

102061780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61575 (or 61573 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 102061780 is about 10102.5630411297. The cubic root of 102061780 is about 467.3271859761.

The spelling of 102061780 in words is "one hundred two million, sixty-one thousand, seven hundred eighty".