402543605 has 8 divisors (see below), whose sum is σ = 483323064. Its totient is φ = 321854400.

The previous prime is 402543599. The next prime is 402543611. The reversal of 402543605 is 506345204.

It is an interprime number because it is at equal distance from previous prime (402543599) and next prime (402543611).

It can be written as a sum of positive squares in 4 ways, for example, as 380689 + 402162916 = 617^2 + 20054^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402543605 - 2²⁴ = 385766389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12326 + ... + 30935.

It is an arithmetic number, because the mean of its divisors is an integer number (60415383).

Almost surely, 2^402543605 is an apocalyptic number.

It is an amenable number.

402543605 is a deficient number, since it is larger than the sum of its proper divisors (80779459).

402543605 is a wasteful number, since it uses less digits than its factorization.

402543605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45127.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 402543605 is about 20063.4893525528. The cubic root of 402543605 is about 738.3647877233.

Adding to 402543605 its reverse (506345204), we get a palindrome (908888809).

The spelling of 402543605 in words is "four hundred two million, five hundred forty-three thousand, six hundred five".