1021434569 has 4 divisors (see below), whose sum is σ = 1038179460. Its totient is φ = 1004689680.

The previous prime is 1021434553. The next prime is 1021434611. The reversal of 1021434569 is 9654341201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9654341201 = 4649 ⋅2076649.

It can be written as a sum of positive squares in 2 ways, for example, as 8922169 + 1012512400 = 2987^2 + 31820^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021434569 - 2⁴ = 1021434553 is a prime.

It is a super-2 number, since 2×1021434569² = 2086657157496431522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021434539) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8372354 + ... + 8372475.

It is an arithmetic number, because the mean of its divisors is an integer number (259544865).

Almost surely, 2^1021434569 is an apocalyptic number.

It is an amenable number.

1021434569 is a deficient number, since it is larger than the sum of its proper divisors (16744891).

1021434569 is an equidigital number, since it uses as much as digits as its factorization.

1021434569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16744890.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 1021434569 is about 31959.8900029396. The cubic root of 1021434569 is about 1007.0944067049.

The spelling of 1021434569 in words is "one billion, twenty-one million, four hundred thirty-four thousand, five hundred sixty-nine".