151209 has 12 divisors (see below), whose sum is σ = 223236. Its totient is φ = 98592.

The previous prime is 151201. The next prime is 151213. The reversal of 151209 is 902151.

151209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 51984 + 99225 = 228^2 + 315^2 .

It is not a de Polignac number, because 151209 - 2³ = 151201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 151191 and 151200.

It is not an unprimeable number, because it can be changed into a prime (151201) 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, 319 + ... + 635.

It is an arithmetic number, because the mean of its divisors is an integer number (18603).

2¹⁵¹²⁰⁹ is an apocalyptic number.

It is an amenable number.

151209 is a deficient number, since it is larger than the sum of its proper divisors (72027).

151209 is a wasteful number, since it uses less digits than its factorization.

151209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376 (or 373 counting only the distinct ones).

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

The square root of 151209 is about 388.8560144835. The cubic root of 151209 is about 53.2752971122.

It can be divided in two parts, 15120 and 9, that added together give a square (15129 = 123²).

The spelling of 151209 in words is "one hundred fifty-one thousand, two hundred nine".