1012005023 has 4 divisors (see below), whose sum is σ = 1013729640. Its totient is φ = 1010280408.

The previous prime is 1012005011. The next prime is 1012005041. The reversal of 1012005023 is 3205002101.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1012005023 - 2¹⁴ = 1011988639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012004989 and 1012005007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012005073) 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, 861428 + ... + 862601.

It is an arithmetic number, because the mean of its divisors is an integer number (253432410).

Almost surely, 2^1012005023 is an apocalyptic number.

1012005023 is a deficient number, since it is larger than the sum of its proper divisors (1724617).

1012005023 is an equidigital number, since it uses as much as digits as its factorization.

1012005023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724616.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 1012005023 is about 31812.0263894019. The cubic root of 1012005023 is about 1003.9857668892.

Adding to 1012005023 its reverse (3205002101), we get a palindrome (4217007124).

The spelling of 1012005023 in words is "one billion, twelve million, five thousand, twenty-three".