1445163457 has 4 divisors (see below), whose sum is σ = 1446596740. Its totient is φ = 1443730176.

The previous prime is 1445163437. The next prime is 1445163563. The reversal of 1445163457 is 7543615441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7543615441 = 947 ⋅7965803.

It can be written as a sum of positive squares in 2 ways, for example, as 316270656 + 1128892801 = 17784^2 + 33599^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445163457 - 2⁷ = 1445163329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1445163437) 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, 715128 + ... + 717145.

It is an arithmetic number, because the mean of its divisors is an integer number (361649185).

Almost surely, 2^1445163457 is an apocalyptic number.

It is an amenable number.

1445163457 is a deficient number, since it is larger than the sum of its proper divisors (1433283).

1445163457 is a wasteful number, since it uses less digits than its factorization.

1445163457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433282.

The product of its digits is 201600, while the sum is 40.

The square root of 1445163457 is about 38015.3055623653. The cubic root of 1445163457 is about 1130.5913465793.

Adding to 1445163457 its reverse (7543615441), we get a palindrome (8988778898).

The spelling of 1445163457 in words is "one billion, four hundred forty-five million, one hundred sixty-three thousand, four hundred fifty-seven".