7865401 has 4 divisors (see below), whose sum is σ = 7994404. Its totient is φ = 7736400.

The previous prime is 7865393. The next prime is 7865443. The reversal of 7865401 is 1045687.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1045687 = 17 ⋅61511.

It can be written as a sum of positive squares in 2 ways, for example, as 3459600 + 4405801 = 1860^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 7865401 - 2³ = 7865393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7865461) 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, 64410 + ... + 64531.

It is an arithmetic number, because the mean of its divisors is an integer number (1998601).

Almost surely, 2^7865401 is an apocalyptic number.

It is an amenable number.

7865401 is a deficient number, since it is larger than the sum of its proper divisors (129003).

7865401 is a wasteful number, since it uses less digits than its factorization.

7865401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129002.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 7865401 is about 2804.5322248104. The cubic root of 7865401 is about 198.8719916127.

The spelling of 7865401 in words is "seven million, eight hundred sixty-five thousand, four hundred one".