1378280245 has 8 divisors (see below), whose sum is σ = 1710968760. Its totient is φ = 1064602560.

The previous prime is 1378280237. The next prime is 1378280261. The reversal of 1378280245 is 5420828731.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 81848209 + 1296432036 = 9047^2 + 36006^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1378280245 - 2³ = 1378280237 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1378280198 and 1378280207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4752546 + ... + 4752835.

It is an arithmetic number, because the mean of its divisors is an integer number (213871095).

Almost surely, 2^1378280245 is an apocalyptic number.

It is an amenable number.

1378280245 is a deficient number, since it is larger than the sum of its proper divisors (332688515).

1378280245 is an equidigital number, since it uses as much as digits as its factorization.

1378280245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9505415.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 1378280245 is about 37125.1969018347. The cubic root of 1378280245 is about 1112.8736096515.

The spelling of 1378280245 in words is "one billion, three hundred seventy-eight million, two hundred eighty thousand, two hundred forty-five".