845501421 has 8 divisors (see below), whose sum is σ = 1148605920. Its totient is φ = 553032272.

The previous prime is 845501417. The next prime is 845501429. The reversal of 845501421 is 124105548.

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 845501421 - 2² = 845501417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845501429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2658651 + ... + 2658968.

It is an arithmetic number, because the mean of its divisors is an integer number (143575740).

Almost surely, 2^845501421 is an apocalyptic number.

It is an amenable number.

845501421 is a deficient number, since it is larger than the sum of its proper divisors (303104499).

845501421 is a wasteful number, since it uses less digits than its factorization.

845501421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5317675.

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 845501421 is about 29077.5071318021. The cubic root of 845501421 is about 945.5941584191.

Adding to 845501421 its reverse (124105548), we get a palindrome (969606969).

The spelling of 845501421 in words is "eight hundred forty-five million, five hundred one thousand, four hundred twenty-one".