1020022257 has 8 divisors (see below), whose sum is σ = 1362703680. Its totient is φ = 678677840.

The previous prime is 1020022189. The next prime is 1020022261. The reversal of 1020022257 is 7522200201.

It is a happy number.

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 1020022257 - 2⁸ = 1020022001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1020072257) 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 7 ways as a sum of consecutive naturals, for example, 332469 + ... + 335522.

It is an arithmetic number, because the mean of its divisors is an integer number (170337960).

Almost surely, 2^1020022257 is an apocalyptic number.

It is an amenable number.

1020022257 is a deficient number, since it is larger than the sum of its proper divisors (342681423).

1020022257 is an equidigital number, since it uses as much as digits as its factorization.

1020022257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668503.

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 1020022257 is about 31937.7872902930. The cubic root of 1020022257 is about 1006.6300312067.

Adding to 1020022257 its reverse (7522200201), we get a palindrome (8542222458).

The spelling of 1020022257 in words is "one billion, twenty million, twenty-two thousand, two hundred fifty-seven".