150409 has 4 divisors (see below), whose sum is σ = 171904. Its totient is φ = 128916.

The previous prime is 150407. The next prime is 150413. The reversal of 150409 is 904051.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 904051 = 101 ⋅8951.

It is a cyclic number.

It is not a de Polignac number, because 150409 - 2¹ = 150407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (150401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10737 + ... + 10750.

It is an arithmetic number, because the mean of its divisors is an integer number (42976).

2¹⁵⁰⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

150409 is a deficient number, since it is larger than the sum of its proper divisors (21495).

150409 is an equidigital number, since it uses as much as digits as its factorization.

150409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21494.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 150409 is about 387.8259919087. The cubic root of 150409 is about 53.1811765618.

The spelling of 150409 in words is "one hundred fifty thousand, four hundred nine".