402543461 has 8 divisors (see below), whose sum is σ = 427680120. Its totient is φ = 378157248.

The previous prime is 402543433. The next prime is 402543497. The reversal of 402543461 is 164345204.

It can be written as a sum of positive squares in 4 ways, for example, as 238857025 + 163686436 = 15455^2 + 12794^2 .

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 402543461 - 2⁶ = 402543397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402543061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186506 + ... + 188651.

It is an arithmetic number, because the mean of its divisors is an integer number (53460015).

Almost surely, 2^402543461 is an apocalyptic number.

It is an amenable number.

402543461 is a deficient number, since it is larger than the sum of its proper divisors (25136659).

402543461 is a wasteful number, since it uses less digits than its factorization.

402543461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375223.

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 402543461 is about 20063.4857639444. The cubic root of 402543461 is about 738.3646996794.

Adding to 402543461 its reverse (164345204), we get a palindrome (566888665).

The spelling of 402543461 in words is "four hundred two million, five hundred forty-three thousand, four hundred sixty-one".