101725780 has 48 divisors (see below), whose sum is σ = 240073344. Its totient is φ = 35925120.

The previous prime is 101725777. The next prime is 101725783. The reversal of 101725780 is 87527101.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (101725777) and next prime (101725783).

It is a super-3 number, since 3×101725780³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101725783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2526 + ... + 14485.

It is an arithmetic number, because the mean of its divisors is an integer number (5001528).

Almost surely, 2^101725780 is an apocalyptic number.

101725780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101725780 is an abundant number, since it is smaller than the sum of its proper divisors (138347564).

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

101725780 is a wasteful number, since it uses less digits than its factorization.

101725780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17056 (or 17054 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 101725780 is about 10085.9198886368. The cubic root of 101725780 is about 466.8137892138.

The spelling of 101725780 in words is "one hundred one million, seven hundred twenty-five thousand, seven hundred eighty".