150921 has 12 divisors (see below), whose sum is σ = 223860. Its totient is φ = 97920.

The previous prime is 150919. The next prime is 150929. The reversal of 150921 is 129051.

It can be written as a sum of positive squares in 2 ways, for example, as 69696 + 81225 = 264^2 + 285^2 .

It is not a de Polignac number, because 150921 - 2¹ = 150919 is a prime.

It is a Curzon number.

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 150894 and 150903.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 150921.

It is not an unprimeable number, because it can be changed into a prime (150929) 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, 165 + ... + 573.

It is an arithmetic number, because the mean of its divisors is an integer number (18655).

2¹⁵⁰⁹²¹ is an apocalyptic number.

150921 is the 246-th heptagonal number.

It is an amenable number.

150921 is a deficient number, since it is larger than the sum of its proper divisors (72939).

150921 is a wasteful number, since it uses less digits than its factorization.

150921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456 (or 453 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 150921 is about 388.4855209657. The cubic root of 150921 is about 53.2414520432.

Adding to 150921 its reverse (129051), we get a palindrome (279972).

The spelling of 150921 in words is "one hundred fifty thousand, nine hundred twenty-one".