1445222657 has 4 divisors (see below), whose sum is σ = 1448166576. Its totient is φ = 1442278740.

The previous prime is 1445222651. The next prime is 1445222699. The reversal of 1445222657 is 7562225441.

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: 7562225441 = 211 ⋅35839931.

It is a cyclic number.

It is not a de Polignac number, because 1445222657 - 2¹⁶ = 1445157121 is a prime.

It is a super-2 number, since 2×1445222657² = 4177337056612279298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445222657.

It is not an unprimeable number, because it can be changed into a prime (1445222651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1471223 + ... + 1472204.

It is an arithmetic number, because the mean of its divisors is an integer number (362041644).

Almost surely, 2^1445222657 is an apocalyptic number.

It is an amenable number.

1445222657 is a deficient number, since it is larger than the sum of its proper divisors (2943919).

1445222657 is an equidigital number, since it uses as much as digits as its factorization.

1445222657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2943918.

The product of its digits is 134400, while the sum is 38.

The square root of 1445222657 is about 38016.0841881433. The cubic root of 1445222657 is about 1130.6067843010.

The spelling of 1445222657 in words is "one billion, four hundred forty-five million, two hundred twenty-two thousand, six hundred fifty-seven".