1020012005 has 8 divisors (see below), whose sum is σ = 1224868992. Its totient is φ = 815439888.

The previous prime is 1020011999. The next prime is 1020012013. The reversal of 1020012005 is 5002100201.

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

It is a cyclic number.

It is not a de Polignac number, because 1020012005 - 2⁸ = 1020011749 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

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, 63257 + ... + 77726.

It is an arithmetic number, because the mean of its divisors is an integer number (153108624).

Almost surely, 2^1020012005 is an apocalyptic number.

It is an amenable number.

1020012005 is a deficient number, since it is larger than the sum of its proper divisors (204856987).

1020012005 is a wasteful number, since it uses less digits than its factorization.

1020012005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142435.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1020012005 is about 31937.6267903550. The cubic root of 1020012005 is about 1006.6266587295.

Adding to 1020012005 its reverse (5002100201), we get a palindrome (6022112206).

The spelling of 1020012005 in words is "one billion, twenty million, twelve thousand, five".