402041005 has 8 divisors (see below), whose sum is σ = 486719352. Its totient is φ = 318786048.

The previous prime is 402040997. The next prime is 402041009. The reversal of 402041005 is 500140204.

It can be written as a sum of positive squares in 4 ways, for example, as 16232841 + 385808164 = 4029^2 + 19642^2 .

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 402041005 - 2³ = 402040997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 402041005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402041009) 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, 355224 + ... + 356353.

It is an arithmetic number, because the mean of its divisors is an integer number (60839919).

Almost surely, 2^402041005 is an apocalyptic number.

It is an amenable number.

402041005 is a deficient number, since it is larger than the sum of its proper divisors (84678347).

402041005 is a wasteful number, since it uses less digits than its factorization.

402041005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711695.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 402041005 is about 20050.9602014467. The cubic root of 402041005 is about 738.0573620658.

Adding to 402041005 its reverse (500140204), we get a palindrome (902181209).

It can be divided in two parts, 40204 and 1005, that added together give a square (41209 = 203²).

The spelling of 402041005 in words is "four hundred two million, forty-one thousand, five".