155415 has 16 divisors (see below), whose sum is σ = 268128. Its totient is φ = 76416.

The previous prime is 155413. The next prime is 155423. The reversal of 155415 is 514551.

It is not a de Polignac number, because 155415 - 2¹ = 155413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155391 and 155400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 204 + ... + 593.

It is an arithmetic number, because the mean of its divisors is an integer number (16758).

2¹⁵⁵⁴¹⁵ is an apocalyptic number.

155415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155415 is a deficient number, since it is larger than the sum of its proper divisors (112713).

155415 is a wasteful number, since it uses less digits than its factorization.

155415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 818.

The product of its digits is 500, while the sum is 21.

The square root of 155415 is about 394.2270919153. The cubic root of 155415 is about 53.7647516749.

Adding to 155415 its reverse (514551), we get a palindrome (669966).

It can be divided in two parts, 15 and 5415, that multiplied together give a square (81225 = 285²).

The spelling of 155415 in words is "one hundred fifty-five thousand, four hundred fifteen".