402143461 has 2 divisors, whose sum is σ = 402143462. Its totient is φ = 402143460.

The previous prime is 402143453. The next prime is 402143471. The reversal of 402143461 is 164341204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 401240961 + 902500 = 20031^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 402143461 - 2³ = 402143453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402143471) by changing a digit.

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 as a sum of consecutive naturals, namely, 201071730 + 201071731.

It is an arithmetic number, because the mean of its divisors is an integer number (201071731).

Almost surely, 2^402143461 is an apocalyptic number.

It is an amenable number.

402143461 is a deficient number, since it is larger than the sum of its proper divisors (1).

402143461 is an equidigital number, since it uses as much as digits as its factorization.

402143461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 402143461 is about 20053.5149288099. The cubic root of 402143461 is about 738.1200521741.

Adding to 402143461 its reverse (164341204), we get a palindrome (566484665).

The spelling of 402143461 in words is "four hundred two million, one hundred forty-three thousand, four hundred sixty-one".