1021425505 has 8 divisors (see below), whose sum is σ = 1226014272. Its totient is φ = 816937968.

The previous prime is 1021425491. The next prime is 1021425511. The reversal of 1021425505 is 5055241201.

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 1021425505 - 2¹⁵ = 1021392737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1021425505.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 979 + ... + 45208.

It is an arithmetic number, because the mean of its divisors is an integer number (153251784).

Almost surely, 2^1021425505 is an apocalyptic number.

It is an amenable number.

1021425505 is a deficient number, since it is larger than the sum of its proper divisors (204588767).

1021425505 is an equidigital number, since it uses as much as digits as its factorization.

1021425505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50615.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 1021425505 is about 31959.7481998842. The cubic root of 1021425505 is about 1007.0914277800.

Adding to 1021425505 its reverse (5055241201), we get a palindrome (6076666706).

The spelling of 1021425505 in words is "one billion, twenty-one million, four hundred twenty-five thousand, five hundred five".