150021 has 12 divisors (see below), whose sum is σ = 220480. Its totient is φ = 98280.

The previous prime is 150011. The next prime is 150041. The reversal of 150021 is 120051.

It is a happy number.

It is not a de Polignac number, because 150021 - 2⁷ = 149893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 149985 and 150012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (150001) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 606 + ... + 816.

2¹⁵⁰⁰²¹ is an apocalyptic number.

It is an amenable number.

150021 is a deficient number, since it is larger than the sum of its proper divisors (70459).

150021 is a wasteful number, since it uses less digits than its factorization.

150021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 150021 is about 387.3254445554. The cubic root of 150021 is about 53.1354078801.

Adding to 150021 its reverse (120051), we get a palindrome (270072).

It can be divided in two parts, 1500 and 21, that added together give a square (1521 = 39²).

The spelling of 150021 in words is "one hundred fifty thousand, twenty-one".