1020521435 has 8 divisors (see below), whose sum is σ = 1225639296. Its totient is φ = 815741440.

The previous prime is 1020521429. The next prime is 1020521443. The reversal of 1020521435 is 5341250201.

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

It is not a de Polignac number, because 1020521435 - 2⁶ = 1020521371 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1020521435.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77771 + ... + 89940.

It is an arithmetic number, because the mean of its divisors is an integer number (153204912).

Almost surely, 2^1020521435 is an apocalyptic number.

1020521435 is a deficient number, since it is larger than the sum of its proper divisors (205117861).

1020521435 is a wasteful number, since it uses less digits than its factorization.

1020521435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168933.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1020521435 is about 31945.6011838876. The cubic root of 1020521435 is about 1006.7942124670.

Adding to 1020521435 its reverse (5341250201), we get a palindrome (6361771636).

The spelling of 1020521435 in words is "one billion, twenty million, five hundred twenty-one thousand, four hundred thirty-five".