4155149 has 4 divisors (see below), whose sum is σ = 4298460. Its totient is φ = 4011840.

The previous prime is 4155121. The next prime is 4155161. The reversal of 4155149 is 9415514.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9415514 = 2 ⋅4707757.

It can be written as a sum of positive squares in 2 ways, for example, as 2418025 + 1737124 = 1555^2 + 1318^2 .

It is a cyclic number.

It is not a de Polignac number, because 4155149 - 2¹² = 4151053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 143281 = 4155149 / (4 + 1 + 5 + 5 + 1 + 4 + 9).

It is an Ulam number.

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 (4155119) 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, 71612 + ... + 71669.

It is an arithmetic number, because the mean of its divisors is an integer number (1074615).

Almost surely, 2^4155149 is an apocalyptic number.

It is an amenable number.

4155149 is a deficient number, since it is larger than the sum of its proper divisors (143311).

4155149 is a wasteful number, since it uses less digits than its factorization.

4155149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143310.

The product of its digits is 3600, while the sum is 29.

The square root of 4155149 is about 2038.4182593374. The cubic root of 4155149 is about 160.7664914749.

The spelling of 4155149 in words is "four million, one hundred fifty-five thousand, one hundred forty-nine".