155127149 has 4 divisors (see below), whose sum is σ = 158910780. Its totient is φ = 151343520.

The previous prime is 155127143. The next prime is 155127221. The reversal of 155127149 is 941721551.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 45024100 + 110103049 = 6710^2 + 10493^2 .

It is a cyclic number.

It is not a de Polignac number, because 155127149 - 2¹² = 155123053 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155127143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891754 + ... + 1891835.

It is an arithmetic number, because the mean of its divisors is an integer number (39727695).

Almost surely, 2^155127149 is an apocalyptic number.

It is an amenable number.

155127149 is a deficient number, since it is larger than the sum of its proper divisors (3783631).

155127149 is an equidigital number, since it uses as much as digits as its factorization.

155127149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783630.

The product of its digits is 12600, while the sum is 35.

The square root of 155127149 is about 12455.0049779195. The cubic root of 155127149 is about 537.3153780206.

The spelling of 155127149 in words is "one hundred fifty-five million, one hundred twenty-seven thousand, one hundred forty-nine".