1378249 has 2 divisors, whose sum is σ = 1378250. Its totient is φ = 1378248.

The previous prime is 1378231. The next prime is 1378253. The reversal of 1378249 is 9428731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 915849 + 462400 = 957^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 1378249 - 2⁵ = 1378217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689124 + 689125.

It is an arithmetic number, because the mean of its divisors is an integer number (689125).

2^1378249 is an apocalyptic number.

It is an amenable number.

1378249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378249 is an equidigital number, since it uses as much as digits as its factorization.

1378249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 1378249 is about 1173.9885007955. The cubic root of 1378249 is about 111.2865200138.

It can be divided in two parts, 13782 and 49, that added together give a palindrome (13831).

The spelling of 1378249 in words is "one million, three hundred seventy-eight thousand, two hundred forty-nine".