1445225520 has 40 divisors (see below), whose sum is σ = 4480199856. Its totient is φ = 385393408.

The previous prime is 1445225503. The next prime is 1445225543. The reversal of 1445225520 is 255225441.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3010647 + ... + 3011126.

Almost surely, 2^1445225520 is an apocalyptic number.

1445225520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445225520 is an abundant number, since it is smaller than the sum of its proper divisors (3034974336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1445225520 is a wasteful number, since it uses less digits than its factorization.

1445225520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6021789 (or 6021783 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 1445225520 is about 38016.1218432391. The cubic root of 1445225520 is about 1130.6075308815.

The spelling of 1445225520 in words is "one billion, four hundred forty-five million, two hundred twenty-five thousand, five hundred twenty".