1012005651 has 4 divisors (see below), whose sum is σ = 1349340872. Its totient is φ = 674670432.

The previous prime is 1012005647. The next prime is 1012005653. The reversal of 1012005651 is 1565002101.

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

It is not a de Polignac number, because 1012005651 - 2² = 1012005647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1012005653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168667606 + ... + 168667611.

It is an arithmetic number, because the mean of its divisors is an integer number (337335218).

Almost surely, 2^1012005651 is an apocalyptic number.

1012005651 is a deficient number, since it is larger than the sum of its proper divisors (337335221).

1012005651 is an equidigital number, since it uses as much as digits as its factorization.

1012005651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337335220.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 1012005651 is about 31812.0362598813. The cubic root of 1012005651 is about 1003.9859745637.

Adding to 1012005651 its reverse (1565002101), we get a palindrome (2577007752).

The spelling of 1012005651 in words is "one billion, twelve million, five thousand, six hundred fifty-one".