870401 has 4 divisors (see below), whose sum is σ = 994752. Its totient is φ = 746052.

The previous prime is 870391. The next prime is 870403. The reversal of 870401 is 104078.

It is a happy number.

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 870401 - 2¹⁴ = 854017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (870403) 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, 62165 + ... + 62178.

It is an arithmetic number, because the mean of its divisors is an integer number (248688).

It is a Proth number, since it is equal to 425 ⋅ 2¹¹ + 1 and 425 < 2¹¹.

2⁸⁷⁰⁴⁰¹ is an apocalyptic number.

It is an amenable number.

870401 is a deficient number, since it is larger than the sum of its proper divisors (124351).

870401 is a wasteful number, since it uses less digits than its factorization.

870401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124350.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 870401 is about 932.9528391082. The cubic root of 870401 is about 95.4786919192.

Adding to 870401 its reverse (104078), we get a palindrome (974479).

The spelling of 870401 in words is "eight hundred seventy thousand, four hundred one".