145121155 has 8 divisors (see below), whose sum is σ = 177431472. Its totient is φ = 113906208.

The previous prime is 145121149. The next prime is 145121159. The reversal of 145121155 is 551121541.

145121155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145121155 - 2³ = 145121147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145121159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273549 + ... + 274078.

It is an arithmetic number, because the mean of its divisors is an integer number (22178934).

Almost surely, 2^145121155 is an apocalyptic number.

145121155 is a deficient number, since it is larger than the sum of its proper divisors (32310317).

145121155 is an equidigital number, since it uses as much as digits as its factorization.

145121155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547685.

The product of its digits is 1000, while the sum is 25.

The square root of 145121155 is about 12046.6242159370. The cubic root of 145121155 is about 525.5050679953.

Adding to 145121155 its reverse (551121541), we get a palindrome (696242696).

It can be divided in two parts, 14 and 5121155, that added together give a square (5121169 = 2263²).

The spelling of 145121155 in words is "one hundred forty-five million, one hundred twenty-one thousand, one hundred fifty-five".