401434781 has 8 divisors (see below), whose sum is σ = 444097728. Its totient is φ = 359800000.

The previous prime is 401434769. The next prime is 401434783. The reversal of 401434781 is 187434104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 401434781 - 2²² = 397240477 is a prime.

It is a super-2 number, since 2×401434781² = 322299766793035922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401434783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 256220 + ... + 257781.

It is an arithmetic number, because the mean of its divisors is an integer number (55512216).

Almost surely, 2^401434781 is an apocalyptic number.

It is an amenable number.

401434781 is a deficient number, since it is larger than the sum of its proper divisors (42662947).

401434781 is a wasteful number, since it uses less digits than its factorization.

401434781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514083.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 401434781 is about 20035.8374169886. The cubic root of 401434781 is about 737.6862115641.

Adding to 401434781 its reverse (187434104), we get a palindrome (588868885).

The spelling of 401434781 in words is "four hundred one million, four hundred thirty-four thousand, seven hundred eighty-one".