101506 has 4 divisors (see below), whose sum is σ = 152262. Its totient is φ = 50752.

The previous prime is 101503. The next prime is 101513. The reversal of 101506 is 605101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 65025 + 36481 = 255^2 + 191^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25375 + ... + 25378.

2¹⁰¹⁵⁰⁶ is an apocalyptic number.

101506 is the 202-nd centered pentagonal number.

101506 is a deficient number, since it is larger than the sum of its proper divisors (50756).

101506 is an equidigital number, since it uses as much as digits as its factorization.

101506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50755.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 101506 is about 318.6000627746. The cubic root of 101506 is about 46.6477360859.

Adding to 101506 its reverse (605101), we get a palindrome (706607).

The spelling of 101506 in words is "one hundred one thousand, five hundred six".