1445742853 has 4 divisors (see below), whose sum is σ = 1451742028. Its totient is φ = 1439743680.

The previous prime is 1445742841. The next prime is 1445742869. The reversal of 1445742853 is 3582475441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3582475441 = 19 ⋅188551339.

It can be written as a sum of positive squares in 2 ways, for example, as 1142913249 + 302829604 = 33807^2 + 17402^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445742853 - 2⁹ = 1445742341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445742253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2999226 + ... + 2999707.

It is an arithmetic number, because the mean of its divisors is an integer number (362935507).

Almost surely, 2^1445742853 is an apocalyptic number.

It is an amenable number.

1445742853 is a deficient number, since it is larger than the sum of its proper divisors (5999175).

1445742853 is an equidigital number, since it uses as much as digits as its factorization.

1445742853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5999174.

The product of its digits is 537600, while the sum is 43.

The square root of 1445742853 is about 38022.9253608925. The cubic root of 1445742853 is about 1130.7424188976.

The spelling of 1445742853 in words is "one billion, four hundred forty-five million, seven hundred forty-two thousand, eight hundred fifty-three".