1445250221 has 8 divisors (see below), whose sum is σ = 1457777664. Its totient is φ = 1432740960.

The previous prime is 1445250217. The next prime is 1445250251. The reversal of 1445250221 is 1220525441.

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 1445250221 - 2² = 1445250217 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 (1445250211) 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, 190721 + ... + 198153.

It is an arithmetic number, because the mean of its divisors is an integer number (182222208).

Almost surely, 2^1445250221 is an apocalyptic number.

It is an amenable number.

1445250221 is a deficient number, since it is larger than the sum of its proper divisors (12527443).

1445250221 is a wasteful number, since it uses less digits than its factorization.

1445250221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9091.

The product of its (nonzero) digits is 3200, while the sum is 26.

The square root of 1445250221 is about 38016.4467171776. The cubic root of 1445250221 is about 1130.6139720856.

Adding to 1445250221 its reverse (1220525441), we get a palindrome (2665775662).

The spelling of 1445250221 in words is "one billion, four hundred forty-five million, two hundred fifty thousand, two hundred twenty-one".