1445253540 has 24 divisors (see below), whose sum is σ = 4046710080. Its totient is φ = 385400928.

The previous prime is 1445253539. The next prime is 1445253577. The reversal of 1445253540 is 453525441.

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 7 ways as a sum of consecutive naturals, for example, 12043720 + ... + 12043839.

It is an arithmetic number, because the mean of its divisors is an integer number (168612920).

Almost surely, 2^1445253540 is an apocalyptic number.

1445253540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1445253540 is an abundant number, since it is smaller than the sum of its proper divisors (2601456540).

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

1445253540 is a wasteful number, since it uses less digits than its factorization.

1445253540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24087571 (or 24087569 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

The square root of 1445253540 is about 38016.4903693121. The cubic root of 1445253540 is about 1130.6148375655.

Adding to 1445253540 its reverse (453525441), we get a palindrome (1898778981).

The spelling of 1445253540 in words is "one billion, four hundred forty-five million, two hundred fifty-three thousand, five hundred forty".