801955421 has 4 divisors (see below), whose sum is σ = 836823072. Its totient is φ = 767087772.

The previous prime is 801955417. The next prime is 801955447. The reversal of 801955421 is 124559108.

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.

It is a cyclic number.

It is not a de Polignac number, because 801955421 - 2² = 801955417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801915421) 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, 17433791 + ... + 17433836.

It is an arithmetic number, because the mean of its divisors is an integer number (209205768).

Almost surely, 2^801955421 is an apocalyptic number.

It is an amenable number.

801955421 is a deficient number, since it is larger than the sum of its proper divisors (34867651).

801955421 is a wasteful number, since it uses less digits than its factorization.

801955421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34867650.

The product of its (nonzero) digits is 14400, while the sum is 35.

The square root of 801955421 is about 28318.8174364679. The cubic root of 801955421 is about 929.0735063344.

The spelling of 801955421 in words is "eight hundred one million, nine hundred fifty-five thousand, four hundred twenty-one".