401165143 has 4 divisors (see below), whose sum is σ = 401717680. Its totient is φ = 400612608.

The previous prime is 401165129. The next prime is 401165147. The reversal of 401165143 is 341561104.

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

It is a cyclic number.

It is not a de Polignac number, because 401165143 - 2¹⁷ = 401034071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401165147) 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, 275178 + ... + 276631.

It is an arithmetic number, because the mean of its divisors is an integer number (100429420).

Almost surely, 2^401165143 is an apocalyptic number.

401165143 is a deficient number, since it is larger than the sum of its proper divisors (552537).

401165143 is an equidigital number, since it uses as much as digits as its factorization.

401165143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552536.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 401165143 is about 20029.1073939904. The cubic root of 401165143 is about 737.5210101455.

The spelling of 401165143 in words is "four hundred one million, one hundred sixty-five thousand, one hundred forty-three".