101240 has 16 divisors (see below), whose sum is σ = 227880. Its totient is φ = 40480.

The previous prime is 101221. The next prime is 101267. The reversal of 101240 is 42101.

101240 is nontrivially palindromic in base 7.

It is a Harshad number since it is a multiple of its sum of digits (8).

It is a congruent number.

It is an unprimeable number.

101240 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1226 + ... + 1305.

2¹⁰¹²⁴⁰ is an apocalyptic number.

101240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101240 is an abundant number, since it is smaller than the sum of its proper divisors (126640).

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

101240 is a wasteful number, since it uses less digits than its factorization.

101240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2542 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 101240 is about 318.1823376619. The cubic root of 101240 is about 46.6069531030.

Adding to 101240 its reverse (42101), we get a palindrome (143341).

The spelling of 101240 in words is "one hundred one thousand, two hundred forty", and thus it is an iban number.