401002145 has 4 divisors (see below), whose sum is σ = 481202580. Its totient is φ = 320801712.

The previous prime is 401002123. The next prime is 401002153. The reversal of 401002145 is 541200104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 183115024 + 217887121 = 13532^2 + 14761^2 .

It is a cyclic number.

It is not a de Polignac number, because 401002145 - 2¹⁰ = 401001121 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 40100210 + ... + 40100219.

It is an arithmetic number, because the mean of its divisors is an integer number (120300645).

Almost surely, 2^401002145 is an apocalyptic number.

It is an amenable number.

401002145 is a deficient number, since it is larger than the sum of its proper divisors (80200435).

401002145 is an equidigital number, since it uses as much as digits as its factorization.

401002145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80200434.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 401002145 is about 20025.0379525233. The cubic root of 401002145 is about 737.4211088647.

Adding to 401002145 its reverse (541200104), we get a palindrome (942202249).

The spelling of 401002145 in words is "four hundred one million, two thousand, one hundred forty-five".