401365505 has 4 divisors (see below), whose sum is σ = 481638612. Its totient is φ = 321092400.

The previous prime is 401365499. The next prime is 401365511. The reversal of 401365505 is 505563104.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (401365499) and next prime (401365511).

It can be written as a sum of positive squares in 2 ways, for example, as 272679169 + 128686336 = 16513^2 + 11344^2 .

It is not a de Polignac number, because 401365505 - 2²⁰ = 400316929 is a prime.

It is a super-2 number, since 2×401365505² = 322188537207810050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40136546 + ... + 40136555.

It is an arithmetic number, because the mean of its divisors is an integer number (120409653).

Almost surely, 2^401365505 is an apocalyptic number.

It is an amenable number.

401365505 is a deficient number, since it is larger than the sum of its proper divisors (80273107).

401365505 is an equidigital number, since it uses as much as digits as its factorization.

401365505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80273106.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 401365505 is about 20034.1085401872. The cubic root of 401365505 is about 737.6437747082.

The spelling of 401365505 in words is "four hundred one million, three hundred sixty-five thousand, five hundred five".