401044781 has 4 divisors (see below), whose sum is σ = 407030592. Its totient is φ = 395058972.

The previous prime is 401044753. The next prime is 401044783. The reversal of 401044781 is 187440104.

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 a de Polignac number, because none of the positive numbers 2^k-401044781 is a prime.

It is a super-2 number, since 2×401044781² = 321673832734675922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401044783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2992805 + ... + 2992938.

It is an arithmetic number, because the mean of its divisors is an integer number (101757648).

Almost surely, 2^401044781 is an apocalyptic number.

It is an amenable number.

401044781 is a deficient number, since it is larger than the sum of its proper divisors (5985811).

401044781 is an equidigital number, since it uses as much as digits as its factorization.

401044781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5985810.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 401044781 is about 20026.1024914984. The cubic root of 401044781 is about 737.4472430326.

Adding to 401044781 its reverse (187440104), we get a palindrome (588484885).

The spelling of 401044781 in words is "four hundred one million, forty-four thousand, seven hundred eighty-one".