845021141 has 4 divisors (see below), whose sum is σ = 845102592. Its totient is φ = 844939692.

The previous prime is 845021137. The next prime is 845021153. The reversal of 845021141 is 141120548.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 845021141 - 2² = 845021137 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 845021141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845021161) 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, 22421 + ... + 46826.

It is an arithmetic number, because the mean of its divisors is an integer number (211275648).

Almost surely, 2^845021141 is an apocalyptic number.

It is an amenable number.

845021141 is a deficient number, since it is larger than the sum of its proper divisors (81451).

845021141 is a wasteful number, since it uses less digits than its factorization.

845021141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81450.

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 845021141 is about 29069.2473414776. The cubic root of 845021141 is about 945.4150788929.

Adding to 845021141 its reverse (141120548), we get a palindrome (986141689).

The spelling of 845021141 in words is "eight hundred forty-five million, twenty-one thousand, one hundred forty-one".