1445646225 has 24 divisors (see below), whose sum is σ = 2391980832. Its totient is φ = 770416000.

The previous prime is 1445646199. The next prime is 1445646227. The reversal of 1445646225 is 5226465441.

It is not a de Polignac number, because 1445646225 - 2⁶ = 1445646161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1445646227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100750 + ... + 114200.

It is an arithmetic number, because the mean of its divisors is an integer number (99665868).

Almost surely, 2^1445646225 is an apocalyptic number.

1445646225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1445646225 is a deficient number, since it is larger than the sum of its proper divisors (946334607).

1445646225 is a wasteful number, since it uses less digits than its factorization.

1445646225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14897 (or 14892 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

The square root of 1445646225 is about 38021.6546851922. The cubic root of 1445646225 is about 1130.7172268167.

The spelling of 1445646225 in words is "one billion, four hundred forty-five million, six hundred forty-six thousand, two hundred twenty-five".