1445427557 has 4 divisors (see below), whose sum is σ = 1651917216. Its totient is φ = 1238937900.

The previous prime is 1445427509. The next prime is 1445427563. The reversal of 1445427557 is 7557245441.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7557245441 = 31 ⋅243782111.

It is a cyclic number.

It is not a de Polignac number, because 1445427557 - 2¹⁰ = 1445426533 is a prime.

It is a super-3 number, since 3×1445427557³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445427457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103244819 + ... + 103244832.

It is an arithmetic number, because the mean of its divisors is an integer number (412979304).

Almost surely, 2^1445427557 is an apocalyptic number.

It is an amenable number.

1445427557 is a deficient number, since it is larger than the sum of its proper divisors (206489659).

1445427557 is an equidigital number, since it uses as much as digits as its factorization.

1445427557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206489658.

The product of its digits is 784000, while the sum is 44.

The square root of 1445427557 is about 38018.7790045919. The cubic root of 1445427557 is about 1130.6602132962.

The spelling of 1445427557 in words is "one billion, four hundred forty-five million, four hundred twenty-seven thousand, five hundred fifty-seven".