401380081 has 8 divisors (see below), whose sum is σ = 425277000. Its totient is φ = 377515008.

The previous prime is 401380079. The next prime is 401380087. The reversal of 401380081 is 180083104.

It can be written as a sum of positive squares in 4 ways, for example, as 116445681 + 284934400 = 10791^2 + 16880^2 .

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 401380081 - 2¹ = 401380079 is a prime.

It is a super-2 number, since 2×401380081² = 322211938847133122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401380087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21045 + ... + 35293.

It is an arithmetic number, because the mean of its divisors is an integer number (53159625).

Almost surely, 2^401380081 is an apocalyptic number.

It is an amenable number.

401380081 is a deficient number, since it is larger than the sum of its proper divisors (23896919).

401380081 is a wasteful number, since it uses less digits than its factorization.

401380081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15923.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 401380081 is about 20034.4723164849. The cubic root of 401380081 is about 737.6527040302.

The spelling of 401380081 in words is "four hundred one million, three hundred eighty thousand, eighty-one".