1445705557 has 8 divisors (see below), whose sum is σ = 1461689600. Its totient is φ = 1429743744.

The previous prime is 1445705543. The next prime is 1445705561. The reversal of 1445705557 is 7555075441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1445705557 - 2²³ = 1437316949 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 (1445705507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148444 + ... + 157882.

It is an arithmetic number, because the mean of its divisors is an integer number (182711200).

Almost surely, 2^1445705557 is an apocalyptic number.

It is an amenable number.

1445705557 is a deficient number, since it is larger than the sum of its proper divisors (15984043).

1445705557 is an equidigital number, since it uses as much as digits as its factorization.

1445705557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11115.

The product of its (nonzero) digits is 490000, while the sum is 43.

The square root of 1445705557 is about 38022.4349167699. The cubic root of 1445705557 is about 1130.7326955151.

The spelling of 1445705557 in words is "one billion, four hundred forty-five million, seven hundred five thousand, five hundred fifty-seven".