445155121 has 4 divisors (see below), whose sum is σ = 447065892. Its totient is φ = 443244352.

The previous prime is 445155101. The next prime is 445155143. The reversal of 445155121 is 121551544.

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 283585600 + 161569521 = 16840^2 + 12711^2 .

It is a cyclic number.

It is not a de Polignac number, because 445155121 - 2¹³ = 445146929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 445155121.

It is not an unprimeable number, because it can be changed into a prime (445155101) 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, 955036 + ... + 955501.

It is an arithmetic number, because the mean of its divisors is an integer number (111766473).

Almost surely, 2^445155121 is an apocalyptic number.

It is an amenable number.

445155121 is a deficient number, since it is larger than the sum of its proper divisors (1910771).

445155121 is a wasteful number, since it uses less digits than its factorization.

445155121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1910770.

The product of its digits is 4000, while the sum is 28.

The square root of 445155121 is about 21098.6995096854. The cubic root of 445155121 is about 763.5493725423.

The spelling of 445155121 in words is "four hundred forty-five million, one hundred fifty-five thousand, one hundred twenty-one".