1021543242 has 16 divisors (see below), whose sum is σ = 2048944800. Its totient is φ = 339538032.

The previous prime is 1021543223. The next prime is 1021543247. The reversal of 1021543242 is 2423451201.

1021543242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (1021543247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241828 + ... + 246015.

It is an arithmetic number, because the mean of its divisors is an integer number (128059050).

Almost surely, 2^1021543242 is an apocalyptic number.

1021543242 is an abundant number, since it is smaller than the sum of its proper divisors (1027401558).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021543242 is a wasteful number, since it uses less digits than its factorization.

1021543242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 488197.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1021543242 is about 31961.5901043737. The cubic root of 1021543242 is about 1007.1301212097.

Adding to 1021543242 its reverse (2423451201), we get a palindrome (3444994443).

The spelling of 1021543242 in words is "one billion, twenty-one million, five hundred forty-three thousand, two hundred forty-two".