445257487 has 4 divisors (see below), whose sum is σ = 445300240. Its totient is φ = 445214736.

The previous prime is 445257467. The next prime is 445257497. The reversal of 445257487 is 784752544.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 445257487 - 2²⁷ = 311039759 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 (445257427) 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, 5563 + ... + 30355.

It is an arithmetic number, because the mean of its divisors is an integer number (111325060).

Almost surely, 2^445257487 is an apocalyptic number.

445257487 is a deficient number, since it is larger than the sum of its proper divisors (42753).

445257487 is a wasteful number, since it uses less digits than its factorization.

445257487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42752.

The product of its digits is 1254400, while the sum is 46.

The square root of 445257487 is about 21101.1252543555. The cubic root of 445257487 is about 763.6078955911.

The spelling of 445257487 in words is "four hundred forty-five million, two hundred fifty-seven thousand, four hundred eighty-seven".