1378149 has 4 divisors (see below), whose sum is σ = 1837536. Its totient is φ = 918764.

The previous prime is 1378147. The next prime is 1378151. The reversal of 1378149 is 9418731.

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 an interprime number because it is at equal distance from previous prime (1378147) and next prime (1378151).

It is a cyclic number.

It is not a de Polignac number, because 1378149 - 2¹ = 1378147 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378141) 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, 229689 + ... + 229694.

It is an arithmetic number, because the mean of its divisors is an integer number (459384).

2^1378149 is an apocalyptic number.

It is an amenable number.

1378149 is a deficient number, since it is larger than the sum of its proper divisors (459387).

1378149 is an equidigital number, since it uses as much as digits as its factorization.

1378149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459386.

The product of its digits is 6048, while the sum is 33.

The square root of 1378149 is about 1173.9459101679. The cubic root of 1378149 is about 111.2838284534.

The spelling of 1378149 in words is "one million, three hundred seventy-eight thousand, one hundred forty-nine".