1020685445 has 32 divisors (see below), whose sum is σ = 1341712512. Its totient is φ = 740881152.

The previous prime is 1020685439. The next prime is 1020685469. The reversal of 1020685445 is 5445860201.

It is a cyclic number.

It is not a de Polignac number, because 1020685445 - 2⁴ = 1020685429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1494074 + ... + 1494756.

It is an arithmetic number, because the mean of its divisors is an integer number (41928516).

Almost surely, 2^1020685445 is an apocalyptic number.

It is an amenable number.

1020685445 is a deficient number, since it is larger than the sum of its proper divisors (321027067).

1020685445 is a wasteful number, since it uses less digits than its factorization.

1020685445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 1020685445 is about 31948.1681008473. The cubic root of 1020685445 is about 1006.8481442017.

The spelling of 1020685445 in words is "one billion, twenty million, six hundred eighty-five thousand, four hundred forty-five".