1020202642 has 8 divisors (see below), whose sum is σ = 1540051596. Its totient is φ = 506852112.

The previous prime is 1020202637. The next prime is 1020202643. The reversal of 1020202642 is 2462020201.

It can be written as a sum of positive squares in 2 ways, for example, as 951660801 + 68541841 = 30849^2 + 8279^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1020202643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1624213 + ... + 1624840.

Almost surely, 2^1020202642 is an apocalyptic number.

1020202642 is a deficient number, since it is larger than the sum of its proper divisors (519848954).

1020202642 is a wasteful number, since it uses less digits than its factorization.

1020202642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3249212.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1020202642 is about 31940.6111713599. The cubic root of 1020202642 is about 1006.6893665968.

Adding to 1020202642 its reverse (2462020201), we get a palindrome (3482222843).

The spelling of 1020202642 in words is "one billion, twenty million, two hundred two thousand, six hundred forty-two".