1378448725 has 12 divisors (see below), whose sum is σ = 1713349540. Its totient is φ = 1100131200.

The previous prime is 1378448713. The next prime is 1378448777. The reversal of 1378448725 is 5278448731.

It can be written as a sum of positive squares in 6 ways, for example, as 59814756 + 1318633969 = 7734^2 + 36313^2 .

It is not a de Polignac number, because 1378448725 - 2¹³ = 1378440533 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54960 + ... + 76009.

Almost surely, 2^1378448725 is an apocalyptic number.

It is an amenable number.

1378448725 is a deficient number, since it is larger than the sum of its proper divisors (334900815).

1378448725 is a wasteful number, since it uses less digits than its factorization.

1378448725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131400 (or 131395 counting only the distinct ones).

The product of its digits is 1505280, while the sum is 49.

The square root of 1378448725 is about 37127.4659113708. The cubic root of 1378448725 is about 1112.9189534310.

The spelling of 1378448725 in words is "one billion, three hundred seventy-eight million, four hundred forty-eight thousand, seven hundred twenty-five".