845407 has 4 divisors (see below), whose sum is σ = 853416. Its totient is φ = 837400.

The previous prime is 845387. The next prime is 845431. The reversal of 845407 is 704548.

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 845407 - 2⁷ = 845279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (845447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3844 + ... + 4057.

It is an arithmetic number, because the mean of its divisors is an integer number (213354).

2⁸⁴⁵⁴⁰⁷ is an apocalyptic number.

845407 is a deficient number, since it is larger than the sum of its proper divisors (8009).

845407 is a wasteful number, since it uses less digits than its factorization.

845407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8008.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 845407 is about 919.4601677071. The cubic root of 845407 is about 94.5558957505. Note that the first 3 decimals are identical.

The spelling of 845407 in words is "eight hundred forty-five thousand, four hundred seven".