120021445 has 8 divisors (see below), whose sum is σ = 152497944. Its totient is φ = 90369024.

The previous prime is 120021443. The next prime is 120021457. The reversal of 120021445 is 544120021.

It can be written as a sum of positive squares in 4 ways, for example, as 45077796 + 74943649 = 6714^2 + 8657^2 .

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 120021445 - 2¹ = 120021443 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 (120021443) 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, 705924 + ... + 706093.

It is an arithmetic number, because the mean of its divisors is an integer number (19062243).

Almost surely, 2^120021445 is an apocalyptic number.

It is an amenable number.

120021445 is a deficient number, since it is larger than the sum of its proper divisors (32476499).

120021445 is a wasteful number, since it uses less digits than its factorization.

120021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412039.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 120021445 is about 10955.4299322300. The cubic root of 120021445 is about 493.2717952926.

Adding to 120021445 its reverse (544120021), we get a palindrome (664141466).

The spelling of 120021445 in words is "one hundred twenty million, twenty-one thousand, four hundred forty-five".