1445167421 has 8 divisors (see below), whose sum is σ = 1497947520. Its totient is φ = 1393305408.

The previous prime is 1445167403. The next prime is 1445167457. The reversal of 1445167421 is 1247615441.

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 1445167421 - 2⁶ = 1445167357 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 (1445167921) 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, 226316 + ... + 232613.

It is an arithmetic number, because the mean of its divisors is an integer number (187243440).

Almost surely, 2^1445167421 is an apocalyptic number.

It is an amenable number.

1445167421 is a deficient number, since it is larger than the sum of its proper divisors (52780099).

1445167421 is an equidigital number, since it uses as much as digits as its factorization.

1445167421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459043.

The product of its digits is 26880, while the sum is 35.

The square root of 1445167421 is about 38015.3576992247. The cubic root of 1445167421 is about 1130.5923802940.

The spelling of 1445167421 in words is "one billion, four hundred forty-five million, one hundred sixty-seven thousand, four hundred twenty-one".