155123145 has 24 divisors (see below), whose sum is σ = 275136576. Its totient is φ = 80807328.

The previous prime is 155123141. The next prime is 155123149. The reversal of 155123145 is 541321551.

155123145 is a `hidden beast` number, since 1 + 5 + 512 + 3 + 145 = 666.

It is an interprime number because it is at equal distance from previous prime (155123141) and next prime (155123149).

It is not a de Polignac number, because 155123145 - 2² = 155123141 is a prime.

It is a super-2 number, since 2×155123145² = 48126380229382050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155123141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38149 + ... + 42018.

It is an arithmetic number, because the mean of its divisors is an integer number (11464024).

Almost surely, 2^155123145 is an apocalyptic number.

155123145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155123145 is a deficient number, since it is larger than the sum of its proper divisors (120013431).

155123145 is a wasteful number, since it uses less digits than its factorization.

155123145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80221 (or 80218 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 155123145 is about 12454.8442382874. The cubic root of 155123145 is about 537.3107550832.

Adding to 155123145 its reverse (541321551), we get a palindrome (696444696).

The spelling of 155123145 in words is "one hundred fifty-five million, one hundred twenty-three thousand, one hundred forty-five".