1378280625 has 20 divisors (see below), whose sum is σ = 2296402416. Its totient is φ = 735082000.

The previous prime is 1378280609. The next prime is 1378280633. The reversal of 1378280625 is 5260828731.

It is not a de Polignac number, because 1378280625 - 2⁴ = 1378280609 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 365667 + ... + 369416.

Almost surely, 2^1378280625 is an apocalyptic number.

1378280625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1378280625 is a deficient number, since it is larger than the sum of its proper divisors (918121791).

1378280625 is an frugal number, since it uses more digits than its factorization.

1378280625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735106 (or 735091 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 1378280625 is about 37125.2020196524. The cubic root of 1378280625 is about 1112.8737119268.

The spelling of 1378280625 in words is "one billion, three hundred seventy-eight million, two hundred eighty thousand, six hundred twenty-five".