1020646045 has 8 divisors (see below), whose sum is σ = 1278026496. Its totient is φ = 781016016.

The previous prime is 1020646043. The next prime is 1020646057. The reversal of 1020646045 is 5406460201.

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 1020646045 - 2¹ = 1020646043 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020646043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4437477 + ... + 4437706.

It is an arithmetic number, because the mean of its divisors is an integer number (159753312).

Almost surely, 2^1020646045 is an apocalyptic number.

It is an amenable number.

1020646045 is a deficient number, since it is larger than the sum of its proper divisors (257380451).

1020646045 is an equidigital number, since it uses as much as digits as its factorization.

1020646045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8875211.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1020646045 is about 31947.5514711222. The cubic root of 1020646045 is about 1006.8351887485.

The spelling of 1020646045 in words is "one billion, twenty million, six hundred forty-six thousand, forty-five".