845240401 has 4 divisors (see below), whose sum is σ = 853139952. Its totient is φ = 837340852.

The previous prime is 845240399. The next prime is 845240411. The reversal of 845240401 is 104042548.

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 845240401 - 2¹ = 845240399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 845240401.

It is not an unprimeable number, because it can be changed into a prime (845240411) 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, 3949615 + ... + 3949828.

It is an arithmetic number, because the mean of its divisors is an integer number (213284988).

Almost surely, 2^845240401 is an apocalyptic number.

It is an amenable number.

845240401 is a deficient number, since it is larger than the sum of its proper divisors (7899551).

845240401 is a wasteful number, since it uses less digits than its factorization.

845240401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7899550.

The product of its (nonzero) digits is 5120, while the sum is 28.

The square root of 845240401 is about 29073.0184363440. The cubic root of 845240401 is about 945.4968416536.

Adding to 845240401 its reverse (104042548), we get a palindrome (949282949).

The spelling of 845240401 in words is "eight hundred forty-five million, two hundred forty thousand, four hundred one".