13778625 has 64 divisors (see below), whose sum is σ = 27256320. Its totient is φ = 6048000.

The previous prime is 13778623. The next prime is 13778641. The reversal of 13778625 is 52687731.

13778625 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

13778625 is a nontrivial binomial coefficient, being equal to C(5250, 2).

It is not a de Polignac number, because 13778625 - 2¹ = 13778623 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13778623) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 76035 + ... + 76215.

It is an arithmetic number, because the mean of its divisors is an integer number (425880).

Almost surely, 2^13778625 is an apocalyptic number.

13778625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13778625 is the 5249-th triangular number and also the 2625-th hexagonal number.

It is an amenable number.

13778625 is a deficient number, since it is larger than the sum of its proper divisors (13477695).

13778625 is a wasteful number, since it uses less digits than its factorization.

13778625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235 (or 225 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 13778625 is about 3711.9570310013. The cubic root of 13778625 is about 239.7371253701.

The spelling of 13778625 in words is "thirteen million, seven hundred seventy-eight thousand, six hundred twenty-five".