101870 has 16 divisors (see below), whose sum is σ = 187488. Its totient is φ = 39840.

The previous prime is 101869. The next prime is 101873. The reversal of 101870 is 78101.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101873) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 527 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (11718).

2¹⁰¹⁸⁷⁰ is an apocalyptic number.

101870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101870 is a deficient number, since it is larger than the sum of its proper divisors (85618).

101870 is a wasteful number, since it uses less digits than its factorization.

101870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235.

The product of its (nonzero) digits is 56, while the sum is 17.

The square root of 101870 is about 319.1708006695. The cubic root of 101870 is about 46.7034290821.

Adding to 101870 its product of nonzero digits (56), we get a triangular number (101926 = T₄₅₁).

Adding to 101870 its reverse (78101), we get a palindrome (179971).

The spelling of 101870 in words is "one hundred one thousand, eight hundred seventy".