1206543542 has 4 divisors (see below), whose sum is σ = 1809815316. Its totient is φ = 603271770.

The previous prime is 1206543517. The next prime is 1206543551. The reversal of 1206543542 is 2453456021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2453456021 = 19211 ⋅127711.

It is a junction number, because it is equal to n+sod(n) for n = 1206543499 and 1206543508.

It is a congruent number.

It is an unprimeable number.

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, 301635884 + ... + 301635887.

It is an arithmetic number, because the mean of its divisors is an integer number (452453829).

Almost surely, 2^1206543542 is an apocalyptic number.

1206543542 is a deficient number, since it is larger than the sum of its proper divisors (603271774).

1206543542 is an equidigital number, since it uses as much as digits as its factorization.

1206543542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603271773.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 1206543542 is about 34735.3356396624. The cubic root of 1206543542 is about 1064.5866108503.

Adding to 1206543542 its reverse (2453456021), we get a palindrome (3659999563).

The spelling of 1206543542 in words is "one billion, two hundred six million, five hundred forty-three thousand, five hundred forty-two".