162021445 has 4 divisors (see below), whose sum is σ = 194425740. Its totient is φ = 129617152.

The previous prime is 162021427. The next prime is 162021451. The reversal of 162021445 is 544120261.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80263681 + 81757764 = 8959^2 + 9042^2 .

It is a cyclic number.

It is not a de Polignac number, because 162021445 - 2⁹ = 162020933 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16202140 + ... + 16202149.

It is an arithmetic number, because the mean of its divisors is an integer number (48606435).

Almost surely, 2^162021445 is an apocalyptic number.

It is an amenable number.

162021445 is a deficient number, since it is larger than the sum of its proper divisors (32404295).

162021445 is an equidigital number, since it uses as much as digits as its factorization.

162021445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32404294.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 162021445 is about 12728.7644726423. The cubic root of 162021445 is about 545.1602312026.

The spelling of 162021445 in words is "one hundred sixty-two million, twenty-one thousand, four hundred forty-five".