151605 has 16 divisors (see below), whose sum is σ = 269760. Its totient is φ = 80784.

The previous prime is 151603. The next prime is 151607. The reversal of 151605 is 506151.

It is an interprime number because it is at equal distance from previous prime (151603) and next prime (151607).

It is not a de Polignac number, because 151605 - 2¹ = 151603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151603) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 427 + ... + 696.

It is an arithmetic number, because the mean of its divisors is an integer number (16860).

2¹⁵¹⁶⁰⁵ is an apocalyptic number.

151605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

151605 is a deficient number, since it is larger than the sum of its proper divisors (118155).

151605 is a wasteful number, since it uses less digits than its factorization.

151605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1131 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 151605 is about 389.3648674444. The cubic root of 151605 is about 53.3217639836.

Adding to 151605 its reverse (506151), we get a palindrome (657756).

The spelling of 151605 in words is "one hundred fifty-one thousand, six hundred five".