151945 has 4 divisors (see below), whose sum is σ = 182340. Its totient is φ = 121552.

The previous prime is 151939. The next prime is 151967. The reversal of 151945 is 549151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 549151 = 17 ⋅32303.

It can be written as a sum of positive squares in 2 ways, for example, as 80656 + 71289 = 284^2 + 267^2 .

It is a cyclic number.

It is not a de Polignac number, because 151945 - 2³ = 151937 is a prime.

151945 is a lucky number.

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15190 + ... + 15199.

It is an arithmetic number, because the mean of its divisors is an integer number (45585).

2¹⁵¹⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

151945 is a deficient number, since it is larger than the sum of its proper divisors (30395).

151945 is an equidigital number, since it uses as much as digits as its factorization.

151945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30394.

The product of its digits is 900, while the sum is 25.

The square root of 151945 is about 389.8012313988. The cubic root of 151945 is about 53.3615952641.

The spelling of 151945 in words is "one hundred fifty-one thousand, nine hundred forty-five".