1328149 has 4 divisors (see below), whose sum is σ = 1350720. Its totient is φ = 1305580.

The previous prime is 1328143. The next prime is 1328161. The reversal of 1328149 is 9418231.

1328149 = T₁₈₂ + T₁₈₃ + ... + T₂₄₀.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328149 is a prime.

It is an Ulam number.

It is a Duffinian number.

1328149 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1328143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11197 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (337680).

2^1328149 is an apocalyptic number.

It is an amenable number.

1328149 is a deficient number, since it is larger than the sum of its proper divisors (22571).

1328149 is an equidigital number, since it uses as much as digits as its factorization.

1328149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22570.

The product of its digits is 1728, while the sum is 28.

The square root of 1328149 is about 1152.4534697765. The cubic root of 1328149 is about 109.9214039108.

It can be divided in two parts, 132 and 8149, that added together give a square (8281 = 91²).

The spelling of 1328149 in words is "one million, three hundred twenty-eight thousand, one hundred forty-nine".