1021712385 has 8 divisors (see below), whose sum is σ = 1634739840. Its totient is φ = 544913264.

The previous prime is 1021712383. The next prime is 1021712399. The reversal of 1021712385 is 5832171201.

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 1021712385 - 2¹ = 1021712383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021712383) 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, 34057065 + ... + 34057094.

It is an arithmetic number, because the mean of its divisors is an integer number (204342480).

Almost surely, 2^1021712385 is an apocalyptic number.

1021712385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1021712385 is a deficient number, since it is larger than the sum of its proper divisors (613027455).

1021712385 is an equidigital number, since it uses as much as digits as its factorization.

1021712385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68114167.

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1021712385 is about 31964.2360302886. The cubic root of 1021712385 is about 1007.1857036533.

Adding to 1021712385 its reverse (5832171201), we get a palindrome (6853883586).

The spelling of 1021712385 in words is "one billion, twenty-one million, seven hundred twelve thousand, three hundred eighty-five".