1445245405 has 4 divisors (see below), whose sum is σ = 1734294492. Its totient is φ = 1156196320.

The previous prime is 1445245397. The next prime is 1445245423. The reversal of 1445245405 is 5045425441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 344399364 + 1100846041 = 18558^2 + 33179^2 .

It is not a de Polignac number, because 1445245405 - 2³ = 1445245397 is a prime.

It is a super-2 number, since 2×1445245405² = 4177468561347228050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144524536 + ... + 144524545.

It is an arithmetic number, because the mean of its divisors is an integer number (433573623).

Almost surely, 2^1445245405 is an apocalyptic number.

It is an amenable number.

1445245405 is a deficient number, since it is larger than the sum of its proper divisors (289049087).

1445245405 is an equidigital number, since it uses as much as digits as its factorization.

1445245405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289049086.

The product of its (nonzero) digits is 64000, while the sum is 34.

The square root of 1445245405 is about 38016.3833761182. The cubic root of 1445245405 is about 1130.6127162378.

The spelling of 1445245405 in words is "one billion, four hundred forty-five million, two hundred forty-five thousand, four hundred five".