155344121 has 8 divisors (see below), whose sum is σ = 160153224. Its totient is φ = 150583680.

The previous prime is 155344103. The next prime is 155344159. The reversal of 155344121 is 121443551.

155344121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 67600 + 155276521 = 260^2 + 12461^2 .

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 155344121 - 2¹⁴ = 155327737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155347121) 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, 5630 + ... + 18503.

It is an arithmetic number, because the mean of its divisors is an integer number (20019153).

Almost surely, 2^155344121 is an apocalyptic number.

It is an amenable number.

155344121 is a deficient number, since it is larger than the sum of its proper divisors (4809103).

155344121 is a wasteful number, since it uses less digits than its factorization.

155344121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24331.

The product of its digits is 2400, while the sum is 26.

The square root of 155344121 is about 12463.7121677292. The cubic root of 155344121 is about 537.5657706429.

Adding to 155344121 its reverse (121443551), we get a palindrome (276787672).

The spelling of 155344121 in words is "one hundred fifty-five million, three hundred forty-four thousand, one hundred twenty-one".