143661446 has 4 divisors (see below), whose sum is σ = 215492172. Its totient is φ = 71830722.

The previous prime is 143661391. The next prime is 143661457. The reversal of 143661446 is 644166341.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×143661446² = 41277222133621832, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35915360 + ... + 35915363.

It is an arithmetic number, because the mean of its divisors is an integer number (53873043).

Almost surely, 2^143661446 is an apocalyptic number.

143661446 is a deficient number, since it is larger than the sum of its proper divisors (71830726).

143661446 is an equidigital number, since it uses as much as digits as its factorization.

143661446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71830725.

The product of its digits is 41472, while the sum is 35.

The square root of 143661446 is about 11985.8852822810. The cubic root of 143661446 is about 523.7371868371.

The spelling of 143661446 in words is "one hundred forty-three million, six hundred sixty-one thousand, four hundred forty-six".