1445622747 has 4 divisors (see below), whose sum is σ = 1927497000. Its totient is φ = 963748496.

The previous prime is 1445622697. The next prime is 1445622781. The reversal of 1445622747 is 7472265441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7472265441 = 3 ⋅2490755147.

It is a cyclic number.

It is not a de Polignac number, because 1445622747 - 2⁸ = 1445622491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1445622699 and 1445622708.

It is not an unprimeable number, because it can be changed into a prime (1445629747) 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, 240937122 + ... + 240937127.

It is an arithmetic number, because the mean of its divisors is an integer number (481874250).

Almost surely, 2^1445622747 is an apocalyptic number.

1445622747 is a deficient number, since it is larger than the sum of its proper divisors (481874253).

1445622747 is an equidigital number, since it uses as much as digits as its factorization.

1445622747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481874252.

The product of its digits is 376320, while the sum is 42.

The square root of 1445622747 is about 38021.3459388276. The cubic root of 1445622747 is about 1130.7111056504.

The spelling of 1445622747 in words is "one billion, four hundred forty-five million, six hundred twenty-two thousand, seven hundred forty-seven".