1029705221 has 4 divisors (see below), whose sum is σ = 1042111392. Its totient is φ = 1017299052.

The previous prime is 1029705217. The next prime is 1029705241. The reversal of 1029705221 is 1225079201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1029705221 - 2² = 1029705217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1029705241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6202961 + ... + 6203126.

It is an arithmetic number, because the mean of its divisors is an integer number (260527848).

Almost surely, 2^1029705221 is an apocalyptic number.

It is an amenable number.

1029705221 is a deficient number, since it is larger than the sum of its proper divisors (12406171).

1029705221 is an equidigital number, since it uses as much as digits as its factorization.

1029705221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406170.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 1029705221 is about 32089.0202561562. The cubic root of 1029705221 is about 1009.8052825296.

The spelling of 1029705221 in words is "one billion, twenty-nine million, seven hundred five thousand, two hundred twenty-one".