1378513225 has 12 divisors (see below), whose sum is σ = 1710493200.
Its totient is φ = 1102077200.
The previous prime is 1378513217. The next prime is 1378513247. The reversal of 1378513225 is 5223158731.
It is not a de Polignac number, because 1378513225 - 23 = 1378513217 is a prime.
It is a super-4 number, since 4×13785132254 (a number of 38 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21726 + ... + 56824.
It is an arithmetic number, because the mean of its divisors is an integer number (142541100).
Almost surely, 21378513225 is an apocalyptic number.
It is an amenable number.
1378513225 is a deficient number, since it is larger than the sum of its proper divisors (331979975).
1378513225 is a wasteful number, since it uses less digits than its factorization.
1378513225 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 36680 (or 36675 counting only the distinct ones).
The product of its digits is 50400, while the sum is 37.
The square root of 1378513225 is about 37128.3345303826.
The cubic root of 1378513225 is about 1112.9363116278.
The spelling of 1378513225 in words is "one billion, three hundred seventy-eight million, five hundred thirteen thousand, two hundred twenty-five".