801951 has 4 divisors (see below), whose sum is σ = 1069272. Its totient is φ = 534632.

The previous prime is 801949. The next prime is 801959. The reversal of 801951 is 159108.

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

It is a cyclic number.

It is not a de Polignac number, because 801951 - 2¹ = 801949 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801959) 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, 133656 + ... + 133661.

It is an arithmetic number, because the mean of its divisors is an integer number (267318).

2⁸⁰¹⁹⁵¹ is an apocalyptic number.

801951 is a deficient number, since it is larger than the sum of its proper divisors (267321).

801951 is a wasteful number, since it uses less digits than its factorization.

801951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267320.

The product of its (nonzero) digits is 360, while the sum is 24.

The square root of 801951 is about 895.5171690146. The cubic root of 801951 is about 92.9071799073.

The spelling of 801951 in words is "eight hundred one thousand, nine hundred fifty-one".