101240280 has 80 divisors (see below), whose sum is σ = 340290720. Its totient is φ = 26996544.

The previous prime is 101240257. The next prime is 101240281. The reversal of 101240280 is 82042101.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101240281) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12384 + ... + 18863.

It is an arithmetic number, because the mean of its divisors is an integer number (4253634).

Almost surely, 2^101240280 is an apocalyptic number.

101240280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101240280 is an abundant number, since it is smaller than the sum of its proper divisors (239050440).

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

101240280 is a wasteful number, since it uses less digits than its factorization.

101240280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31270 (or 31257 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 101240280 is about 10061.8228964736. The cubic root of 101240280 is about 466.0699606998.

Adding to 101240280 its reverse (82042101), we get a palindrome (183282381).

The spelling of 101240280 in words is "one hundred one million, two hundred forty thousand, two hundred eighty".