1543303642 has 4 divisors (see below), whose sum is σ = 2314955466. Its totient is φ = 771651820.

The previous prime is 1543303621. The next prime is 1543303687. The reversal of 1543303642 is 2463033451.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2463033451 = 379 ⋅6498769.

It can be written as a sum of positive squares in only one way, i.e., 1037548521 + 505755121 = 32211^2 + 22489^2 .

It is a super-2 number, since 2×1543303642² = 4763572262820928328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 385825909 + ... + 385825912.

Almost surely, 2^1543303642 is an apocalyptic number.

1543303642 is a deficient number, since it is larger than the sum of its proper divisors (771651824).

1543303642 is an equidigital number, since it uses as much as digits as its factorization.

1543303642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771651823.

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 1543303642 is about 39284.9034872176. The cubic root of 1543303642 is about 1155.6255282449.

The spelling of 1543303642 in words is "one billion, five hundred forty-three million, three hundred three thousand, six hundred forty-two".