1020394771 has 8 divisors (see below), whose sum is σ = 1118988288. Its totient is φ = 922773000.

The previous prime is 1020394751. The next prime is 1020394789. The reversal of 1020394771 is 1774930201.

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 1020394771 - 2⁷ = 1020394643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020394721) 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, 240735 + ... + 244936.

It is an arithmetic number, because the mean of its divisors is an integer number (139873536).

Almost surely, 2^1020394771 is an apocalyptic number.

1020394771 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020394771 is a deficient number, since it is larger than the sum of its proper divisors (98593517).

1020394771 is a wasteful number, since it uses less digits than its factorization.

1020394771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485873.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 1020394771 is about 31943.6186272000. The cubic root of 1020394771 is about 1006.7525573372.

The spelling of 1020394771 in words is "one billion, twenty million, three hundred ninety-four thousand, seven hundred seventy-one".