155405145 has 32 divisors (see below), whose sum is σ = 285143040. Its totient is φ = 70799040.

The previous prime is 155405099. The next prime is 155405153. The reversal of 155405145 is 541504551.

It is not a de Polignac number, because 155405145 - 2⁷ = 155405017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30276 + ... + 35034.

It is an arithmetic number, because the mean of its divisors is an integer number (8910720).

Almost surely, 2^155405145 is an apocalyptic number.

155405145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155405145 is a deficient number, since it is larger than the sum of its proper divisors (129737895).

155405145 is a wasteful number, since it uses less digits than its factorization.

155405145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 155405145 is about 12466.1599941602. The cubic root of 155405145 is about 537.6361522764.

Adding to 155405145 its reverse (541504551), we get a palindrome (696909696).

The spelling of 155405145 in words is "one hundred fifty-five million, four hundred five thousand, one hundred forty-five".