151409 has 8 divisors (see below), whose sum is σ = 164160. Its totient is φ = 139216.

The previous prime is 151397. The next prime is 151423. The reversal of 151409 is 904151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151409 - 2⁸ = 151153 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554 + ... + 780.

It is an arithmetic number, because the mean of its divisors is an integer number (20520).

2¹⁵¹⁴⁰⁹ is an apocalyptic number.

It is an amenable number.

151409 is a deficient number, since it is larger than the sum of its proper divisors (12751).

151409 is a wasteful number, since it uses less digits than its factorization.

151409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 279.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 151409 is about 389.1130940999. The cubic root of 151409 is about 53.2987753556.

The spelling of 151409 in words is "one hundred fifty-one thousand, four hundred nine".