1020002535 has 24 divisors (see below), whose sum is σ = 1785517344. Its totient is φ = 538612800.

The previous prime is 1020002519. The next prime is 1020002563. The reversal of 1020002535 is 5352000201.

It is a happy number.

It is not a de Polignac number, because 1020002535 - 2⁴ = 1020002519 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107667 + ... + 116756.

It is an arithmetic number, because the mean of its divisors is an integer number (74396556).

Almost surely, 2^1020002535 is an apocalyptic number.

1020002535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1020002535 is a deficient number, since it is larger than the sum of its proper divisors (765514809).

1020002535 is a wasteful number, since it uses less digits than its factorization.

1020002535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224535 (or 224532 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1020002535 is about 31937.4785322824. The cubic root of 1020002535 is about 1006.6235434773.

Adding to 1020002535 its reverse (5352000201), we get a palindrome (6372002736).

The spelling of 1020002535 in words is "one billion, twenty million, two thousand, five hundred thirty-five".