143402461 has 8 divisors (see below), whose sum is σ = 147309624. Its totient is φ = 139514880.

The previous prime is 143402437. The next prime is 143402473. The reversal of 143402461 is 164204341.

It can be written as a sum of positive squares in 4 ways, for example, as 1196836 + 142205625 = 1094^2 + 11925^2 .

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 143402461 - 2⁷ = 143402333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (143402561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10605 + ... + 19981.

It is an arithmetic number, because the mean of its divisors is an integer number (18413703).

Almost surely, 2^143402461 is an apocalyptic number.

It is an amenable number.

143402461 is a deficient number, since it is larger than the sum of its proper divisors (3907163).

143402461 is an equidigital number, since it uses as much as digits as its factorization.

143402461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791.

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

The square root of 143402461 is about 11975.0766594624. The cubic root of 143402461 is about 523.4222759383.

The spelling of 143402461 in words is "one hundred forty-three million, four hundred two thousand, four hundred sixty-one".